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 previous alignment of all the warnings/ignores
led to too many warnings that weren't there before. This
commit relaxes them a bit.
The core/org.eclipse.cdt.core/.settings/org.eclipse.jdt.core.prefs
is still the "master" copy, with
releng/scripts/check_code_cleanliness.sh containing the
exceptions that apply to test plug-ins.
Change-Id: Ibd4e31ade0b42b31e7cbe5a94f06c6fc15183a56
The releng/scripts/apply_jdt_prefs_to_all_projects.sh was run to
copy standard settings to all other projects.
Change-Id: I4436c947d7f0142f56b709e661379c3eb54f666b
