Bug 525599 - Move p2 ui.admin bundles to Java 8

* Bump BREEs
* Bump minor versions
* Enable warnings for newer Java versions features
* Remove redundant type arguments
* Add missing override annotations
* Convert to lambdas

Change-Id: I22c34216df3004d11b7fbe64104a8674db8f4712
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
41 files changed