Add Red Hat Enterprise to Packaging Jenkins

This will add Red Hat Enterprise to pkg-jenkins. Rhel 6.1 x86/x64 is
used for license check

Change-Id: Ibe36d28b0a55a5e794482152b05b7a2aa8c7a32a
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>