Merge pull request #112 from fnordahl/branch-22.03-bug/2045865

[branch-22.03] snap/hooks/pre-refresh: Add timeout to *-appctl calls.

snap/hooks/pre-refresh

@@ -1,13 +1,17 @@
 #!/bin/sh
 
+# The amout of time to wait in seconds for the case where the app socket
+# accepts connections and the daemon for some reason does not service requests.
+TIMEOUT=30
+
 # NOTE(fnordahl): tell the ovn-controller to exit without cleaning up flows nor
 # SB DB state on refresh.
-${SNAP}/commands/ovn-appctl exit --restart || true
+${SNAP}/commands/ovn-appctl --timeout ${TIMEOUT} exit --restart || true
 
 # Note (mkalcok): `microovn.switch` service, by default, stops OVS
 # vswitch daemon with `--cleanup` flag that releases datapath
 # resources like ports and bridges. This hook prevents such behavior
 # by stopping the daemon without `--cleanup` flag during the snap
 # refresh.
 
-${SNAP}/commands/ovs-appctl exit || true
+${SNAP}/commands/ovs-appctl --timeout ${TIMEOUT} exit || true