fuel plugin: Pick updated libpcre packages.

Account for changes in SR3 iso that caused the plugin deploy to fail
when it tried to downgrade libpcre packages.

Change-Id: I6a11fc2e887a76cf879b1c1a398784da691b8329
Signed-off-by: Billy O'Mahony <billy.o.mahony@intel.com>
Reviewed-by: Jonas Bjurel <jonas.bjurel@ericsson.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>
Reviewed-by: Tom Herbert <therbert@redhat.com>
Reviewed-by: Michal Skalski <mskalski@mirantis.com>