core: modify copyright of base po

Change-Id: I11ea0e9a840168d180182685078c9dcb43aa7bd5
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
config: added backward compatibilty

Added backward compatibility supporting upgrade from
3.1 version which used the keyword rhevm instead of engine.
When reading configurarion files, the user will be warned
that there is a deprecated key that needs to be updated.

Change-Id: I6755c1ad020ee3220aa5f5335c6d66ead5139e57
Bug-Url: https://bugzilla.redhat.com/975209
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>