tests: Fix mcast test on slow systems
On slow systems(or which start processes slow) the test:
`testing mcast - delete the port mdb when port destroyed`
is influenced by the running time.
i.e.:
This patches adds a time stop on vswitchd.
@@ -181,6 +181,8 @@ AT_CHECK([
-- set Interface p2 type=dummy other-config:hwaddr=aa:55:aa:55:00:02 ofport_request=2 \
], [0])
+ovs-appctl time/stop
+
# send report packets
AT_CHECK([
ovs-appctl netdev-dummy/receive p1 \
