Forcing version on maven3

Jpackage have a newer maven thatn te one we have on ci-tools, and it
requires the jpackage devel repos to be enabled (which we don't want) so
I force here the maven3 version we have.

Change-Id: I5c5091978c1a424ab2fcf1c6e26f0dcbed8df676
Signed-off-by: David Caro <dcaroest@redhat.com>