1. Support for multiple parameters in java method exec
2. Support for static method Exec
3. Minor refactoring changes

fixes #622 , #626

PR Branch

Motivation and Context

With this PR, it will be possible to do java exec of static methods as well as methods with multiple arguments.

For static methods, they have to be invoked in exactly the same way as instance methods were invoked up to this point.

As for methods with multiple arguments, let's say there is a method like so

public Map<String, String> sampleMultiArgMethod1(String arg1, String arg2)

It would be invoked in the following way:

{
      "name": "sample method 1",
      "url": "org.jsmart.zerocode.zerocodejavaexec.SampleMethods",
      "method": "sampleMultiArgMethod1",
      "request": {
        "0" : "arg1value",
        "1" : "arg2value"
      }

The arguments will have to be provided as a json with the key being the 0 indexed order of occurrence in the java method argument list.

Checklist:

• Unit tests added

• Integration tests added

• Test names are meaningful

• Feature manually tested

• Branch build passed

• No 'package.*' in the imports

• Relevant Wiki page updated with clear instruction for the end user

  • Not applicable. This was only a refactor change, no functional or behaviour changes were introduced

• Http test added to http-testing module(if applicable) ?

  • Not applicable. The changes did not affect HTTP automation flow

• Kafka test added to kafka-testing module(if applicable) ?

  • Not applicable. The changes did not affect Kafka automation flow