rpm: Depend on procps not procps-ng

MOM only uses a very basic ps invocation to find the pid of a running
qemu process.  Therefore the basic procps package is enough.  This
allows MOM to build on CentOS which has procps but not procps-ng

Change-Id: I3b967cdbe63558f1c374a1e2ae0ba175533c98b5
Signed-off-by: Adam Litke <alitke@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/23137
Reviewed-by: Sandro Bonazzola <sbonazzo@redhat.com>
Reviewed-by: Doron Fediuck <dfediuck@redhat.com>