Fix up contrail-setup build for SLE12

We can just use the system-provided pycrypto package, so require
it.

Partial-Bug: #1488627
Change-Id: Ie321198be461c94dbaf06f51cd14760aca51e3cb
(cherry picked from commit 5923fc8)

common/rpm/contrail-setup.spec

@@ -49,6 +49,9 @@ Requires:	    openstack-utils
 #Requires:	    python-Fabric
 Requires:	    python-crypto
 %endif
+%if 0%{?suse_version}
+Requires:           python-pycrypto
+%endif
 %if 0%{?rhel}
 Requires:	    python-argparse
 Requires:	    gdb