utils: introduce universal utilities (uutils)

a package of packages that may be split out of engine, not directly
related to engine and can be split even to own jars.

this will enable components that should not pull the engine 'common'
part to enjoy these utilities.

Change-Id: Ibb5dab40276b3363dbd8f2bbba15933b67c5f220
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>