Warning in build.properties will be errors when they run
in the tycho build, like this:
```
Error: Failed to execute goal org.eclipse.tycho:tycho-packaging-plugin:2.7.5:package-plugin
(default-package-plugin) on project org.eclipse.cdt.core.tests:
/home/runner/work/cdt/cdt/core/org.eclipse.cdt.core.tests/build.properties:
bin.includes value(s) [test.xml] do not match any files. -> [Help 1]
```
So make them errors in the workspace so that the issue is
detected before push.
Some build.properties issues don't affect the build, but
are still indicative of a problem.
The bundles have all had version bumped to make it easier to
differentiate the bundles built since integration into CDT.
Note the feature versions have already been aligned with CDT.
Change-Id: I68141e31559df3897414a50ee52c3ede49d429df
Includes removing redundant content that will be provided by CDT:
- .mvn/extensions.xml
- .gitignore
- CONTRIBUTING
- LICENSE
- NOTICE
- root pom.xmls
Note: if you get to this commit when searching history or
doing git blame, try adding --follow to force the history
back before this move.
Change-Id: I42bdbb2cf8e7f07d6608c32eaabf2b54151a1fb1