Bug 535636 - Update bundles to Java 1.8

Take care of p2.tests.optimizers. Bump BREE, enable more warnings and
fix them, remove parts testing non existing code, convert to JUnit 4 and
etc.

Change-Id: I8992fa1cf4bdb42a76e288e5b28aae466db21c80
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
25 files changed