Bug 509473: Bump p2.engine and equinox.simpleconfigurator to JavaSE-1.7.

Enable some java 1.7 and older code style warnings and fix them:
* Add missing @Override.
* Remove redundant type declarations.
* Remove useless non-javadoc comments.

Change-Id: If80ea62f65204cad77275e07fee096a276d35c5c
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
52 files changed