Introduce features-parent

This is a migrated utility parent for features artifact. Downstream
projects should refer to this artifact as their parent, fill in the few
gaps and should be locked'n'ready for generating their feature and run
the test.

Change-Id: I44b892b18a73ce5c2fe8cf2462d70b19840ce6a2
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "Introduce features-parent"