Many MANIFEST.MF: Replace org.junit4 with org.junit (4.8.2)

clipse 3 has junit plugins org.junit (3.8), org.junit (4.8) and
org.junit4, and the latter was often picked to get version 4.x.
Eclipse 3 has no longer has org.junit4.
By changing the MANIFEST.MFs to use org.junit;bundle-version="4.8.2",
the code works for both branches.

This which makes it a lot easier to compare the two branches, because
many plugins only differ regarding the junit settings.
Merge pull request #327 from ControlSystemStudio/bug_326

Many MANIFEST.MF: Replace org.junit4 with org.junit (4.8.2)
Merge branch 'master' into 4.0.x

Conflicts:
	core/plugins/org.csstudio.data.test/META-INF/MANIFEST.MF