Lock the maven-compiler-plugin version to avoid the warning log

[nisiyong]

Lock the maven-compiler-plugin version to avoid the warning log when building. the brief changes as follow:

• fix the test plugin maven archetypes
• fix all existing test cases

[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.apache.skywalking:dubbo-2.7.x-scenario:jar:5.0.0
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 80, column 21
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 

• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes #.
• Update the CHANGES log.

[wu-sheng]

This is for test scenarios only, right?

[nisiyong]

This is for test scenarios only, right?

Yes, all changes are under the test/plugin folder, you could take a look. This is dirty work, but I can't stand the warning.

[wu-sheng]

  [INFO] Changes detected - recompiling the module!
  [INFO] Compiling 15 source files to /home/runner/work/skywalking-java/skywalking-java/test/plugin/runner-helper/target/classes
  [INFO] -------------------------------------------------------------
  Error:  COMPILATION ERROR : 
  [INFO] -------------------------------------------------------------
  Error:  /home/runner/work/skywalking-java/skywalking-java/test/plugin/runner-helper/src/main/java/org/apache/skywalking/plugin/test/helper/DockerComposeRunningGenerator.java:[56,36] multi-catch statements are not supported in -source 6
    (use -source 7 or higher to enable multi-catch statements)
  Error:  /home/runner/work/skywalking-java/skywalking-java/test/plugin/runner-helper/src/main/java/org/apache/skywalking/plugin/test/helper/ConfigurationImpl.java:[115,38] lambda expressions are not supported in -source 6
    (use -source 8 or higher to enable lambda expressions)
  Error:  /home/runner/work/skywalking-java/skywalking-java/test/plugin/runner-helper/src/main/java/org/apache/skywalking/plugin/test/helper/ConfigurationImpl.java:[170,54] diamond operator is not supported in -source 6

You seem not just updating the test cases, also updated the test tool. Compiling failed.

[nisiyong]

Okay, the test tool changes will be revert.