Fix OOM issue on broker wait-zookeeper-ready initContainer

[got-root]

Motivation

Getting OOM issues on broker startup in the wait-zookeeper-ready initContainer:

pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds ...                                                                                                                                                         
[1.007s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[1.694s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.282s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.785s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[3.086s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[3.086s][error][gc] Forced to lower max Java heap size from 2048M(100%) to 1508M(74%)                                                                                                                                                  
[3.086s][error][gc] Failed to allocate initial Java heap (2048M)                                                                                                                                                                       
Error: Could not create the Java Virtual Machine.                                                                                                                                                                                      
Error: A fatal exception has occurred. Program will exit.                                                                                                                                                                              
pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds ...                                                                                                                                                         
[1.114s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[1.738s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.111s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.421s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.762s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.762s][error][gc] Forced to lower max Java heap size from 2048M(100%) to 1508M(74%)                                                                                                                                                  
[2.762s][error][gc] Failed to allocate initial Java heap (2048M)                                                                                                                                                                       
Error: Could not create the Java Virtual Machine.                                                                                                                                                                                      
Error: A fatal exception has occurred. Program will exit.                                                                                                                                                                              
pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds ...                                                                                                                                                         
[1.082s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[1.707s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.067s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.354s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.644s][error][gc] Failed to commit memory (Not enough space)                                                                                                                                                                         
[2.644s][error][gc] Forced to lower max Java heap size from 2048M(100%) to 1508M(74%)                                                                                                                                                  
[2.644s][error][gc] Failed to allocate initial Java heap (2048M)                                                                                                                                                                       
Error: Could not create the Java Virtual Machine.                                                                                                                                                                                      
Error: A fatal exception has occurred. Program will exit. 
Killed

Modifications

Looks like the check to see if zookeeper is running mistakenly has set the BOOKIE_MEM env var when it should be setting PULSAR_MEM instead.

Verifying this change

• Make sure that the change passes the CI checks.
• Tested on live env