tests: Fix typos in tests.

Test was using ovs-sbctl instead of ovn-sbctl for some
debugging purposes.

Signed-off-by: Xavier Simonart <xsimonar@redhat.com>
Signed-off-by: Mark Michelson <mmichels@redhat.com>

tests/ovn.at

@@ -6222,7 +6222,7 @@ ovs-vsctl -- add-port br-int vif2 -- \
 wait_for_ports_up
 check ovn-nbctl --wait=hv sync
 
-ovs-sbctl dump-flows > sbflows
+ovn-sbctl dump-flows > sbflows
 AT_CAPTURE_FILE([sbflows])
 
 # Send ip packets between the two ports.
@@ -6240,7 +6240,7 @@ as hv1 ovs-appctl netdev-dummy/receive vif1 $packet
 #Disable router R1
 ovn-nbctl --wait=hv set Logical_Router R1 enabled=false
 
-ovs-sbctl dump-flows > sbflows2
+ovn-sbctl dump-flows > sbflows2
 AT_CAPTURE_FILE([sbflows2])
 
 as hv1 ovs-appctl netdev-dummy/receive vif1 $packet