Add useful information to ovn E2E tests

Modify E2E test to output the OF flows from all three
hypervisors to help debug when something goes wrong.

Signed-off-by: RYAN D. MOATS <rmoats@us.ibm.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

tests/ovn.at

@@ -1108,8 +1108,22 @@ ovn_populate_arp
 # Allow some time for ovn-northd and ovn-controller to catch up.
 # XXX This should be more systematic.
 sleep 1
+echo "------ OVN dump ------"
+ovn-nbctl show
 ovn-sbctl show
 
+echo "------ hv1 dump ------"
+as hv1 ovs-vsctl show
+as hv1 ovs-ofctl -O OpenFlow13 dump-flows br-int
+
+echo "------ hv2 dump ------"
+as hv2 ovs-vsctl show
+as hv2 ovs-ofctl -O OpenFlow13 dump-flows br-int
+
+echo "------ hv3 dump ------"
+as hv3 ovs-vsctl show
+as hv3 ovs-ofctl -O OpenFlow13 dump-flows br-int
+
 # test_packet INPORT DST SRC ETHTYPE OUTPORT...
 #
 # This shell function causes a packet to be received on INPORT.  The packet's