[INTERNAL] cleaned up Utils and CoreUtils class

Moved/Inlined methods. Deleted Utils class as it is empty now.
 
Change-Id: I10b8f4c4d6acbd48f51a8d9565c63ddf44abae64
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1735
Tested-by: Saros-Core QA
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>