Enable and fix deprecation and unchecked warnings

[orgads]

Testing done

Submitter checklist

Preview Give feedback

1. Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
2. Ensure that the pull request title represents the desired changelog entry
3. Please describe what you did
4. Link to relevant issues in GitHub or Jira
5. Link to relevant pull requests, esp. upstream and downstream changes
6. Ensure you have provided tests - that demonstrates feature works or fixes the issue

[WARNING] /home/audc/yaml-axis-plugin/src/main/java/org/jenkinsci/plugins/yamlaxis/YamlAxis.java:[34,43] name in hudson.matrix.Axis has been deprecated
[WARNING] /home/audc/yaml-axis-plugin/src/main/java/org/jenkinsci/plugins/yamlaxis/YamlAxis.java:[46,43] name in hudson.matrix.Axis has been deprecated
[WARNING] /home/audc/yaml-axis-plugin/src/main/java/org/jenkinsci/plugins/yamlaxis/YamlMatrixExecutionStrategy.java:[116,42] unchecked cast
  required: java.util.Map<java.lang.String,java.lang.String>
  found:    java.util.Map<java.lang.String,capture#1 of ?>
[WARNING] /home/audc/yaml-axis-plugin/src/main/java/org/jenkinsci/plugins/yamlaxis/YamlTextLoader.java:[17,14] getContent() in org.jenkinsci.plugins.yamlaxis.YamlTextLoader overrides getContent() in org.jenkinsci.plugins.yamlaxis.YamlLoader
  return type requires unchecked conversion from java.util.Map to java.util.Map<java.lang.String,java.lang.Object>
[WARNING] /home/audc/yaml-axis-plugin/src/main/java/org/jenkinsci/plugins/yamlaxis/YamlFileLoader.java:[23,14] getContent() in org.jenkinsci.plugins.yamlaxis.YamlFileLoader overrides getContent() in org.jenkinsci.plugins.yamlaxis.YamlLoader
  return type requires unchecked conversion from java.util.Map to java.util.Map<java.lang.String,java.lang.Object>

[sue445]

@orgads LGTM

If possible, could you post a log of the warnings you get when -Xlint:deprecation and -Xlint:unchecked are enabled?

[orgads]

@orgads LGTM

If possible, could you post a log of the warnings you get when -Xlint:deprecation and -Xlint:unchecked are enabled?

Sure. Added to the commit message and to the issue body.

[sue445]

thx!