Fix packaging of missing resources in JDK 1.8 (backward compatibile) helix jars

[himanshukandwal]

Is your feature request related to a problem? Please describe.
While fixing for the Provide JDK 1.8 (backward compatibile) jar issue, we missed packaging of the src/main/resources contents in the jdk8 jar. We need to fix this.

We can see that in the classes_jdk8 folder we are missing several properties files:

Describe the solution you'd like
Solution should package the src/main/resources in the jdk8 jar just like jdk11 jar.

Additional context
N/A