Push down code related to java partition scanners, now that o.e.jface…

[robstryker]

….text.rules have been moved to org.eclipse.text

What it does

How to test

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)

[robstryker]

@jjohnstn I noticed in #992 that you didn't like me removing the api problem filter.

The problem is, my patches continue to fail unless I remove the problem filter. For example: https://ci.eclipse.org/jdt/job/eclipse.jdt.ui-github/job/PR-1011/2/consoleFull

15:41:25  [INFO] API Analysis finished in 19 s.
15:41:25  [INFO] 0 API ERRORS
15:41:25  [INFO] 1 API warnings
15:41:25  [WARNING] [API WARNING] File MANIFEST.MF at line 0: The API problem filter for: 'The minor version should be the same for version 1.21.0, since no new APIs have been added since version 1.20.0' is no longer used (location: /home/jenkins/agent/workspace/eclipse.jdt.ui-github_PR-1011/org.eclipse.jdt.core.manipulation/META-INF/MANIFEST.MF)

I'm sorry if I keep causing extra work by removing this filter, but the build basically keeps demanding it. :|

[jjohnstn]

Hi @robstryker The time before I applied your patch and I got an error, but with this patch I am no longer setting the error. Probably because you added the split in MANIFEST.MF so this time it is fine to remove.

[jjohnstn]

I did a review and I'm fine once it passes verification. I will restart the build in case it is a spurious error.

[robstryker]

Thanks. I'm unable to replicate the test failure locally. Will keep my eye on it.

[jjohnstn]

Looks good, thanks.