[Java] - README instructions are insufficient to run the sample code

[matthew-carroll]

Describe the bug
The Java sample README says to run mvn exec:java from within the simple-console directory. However, for me, that was insufficient. Maven complained about not being able to find the main file - I got a class not found exception at the terminal. I couldn't run the sample.

To Reproduce
Steps to reproduce the behavior:

1. Clone the repo
2. Navigate to the simple-console Java directory
3. Run mvn exec:java

Expected behavior
The sample app runs.

Actual behavior
I get a class not found exception for the Sample class.

Resolution
Running mvn clean install from within the simple-console directory solved the problem. HOWEVER, to get mvn clean install to run, I had to copy the two lint configuration XML files from the top-level Java directory down into the simple-console directory. Without copying those files, mvn clean install was failing on the lint lifecycle.

The README for the sample app should include all necessary steps to build and run the sample app, and that build process shouldn't require copying any files.

Platform (please complete the following information):

• Platform: Java
• Environment: console app
• Version of package: GitHub version: 8d2eeda