Automated cherry pick of #2695: Wait for ovs-vswitchd PID before calling ovs-appctl

[tnqn]

Cherry pick of #2695 on release-1.3.

#2695: Wait for ovs-vswitchd PID before calling ovs-appctl

For details on the cherry pick process, see the cherry pick requests page.

[tnqn]

/test-all

[codecov-commenter]

Codecov Report

Merging #2711 (ab950f5) into release-1.3 (b8a6983) will decrease coverage by 0.02%.
The diff coverage is 46.66%.

@@               Coverage Diff               @@
##           release-1.3    #2711      +/-   ##
===============================================
- Coverage        60.68%   60.66%   -0.03%     
===============================================
  Files              285      285              
  Lines            23020    23032      +12     
===============================================
+ Hits             13970    13972       +2     
- Misses            7551     7552       +1     
- Partials          1499     1508       +9     

Flag	Coverage Δ
e2e-tests	∅ <ø> (?)
kind-e2e-tests	48.36% <46.66%> (-0.06%)	⬇️
unit-tests	41.00% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/ovs/ovsctl/interface.go	0.00% <0.00%> (ø)
pkg/ovs/ovsctl/ovsctl_others.go	52.00% <50.00%> (+2.00%)	⬆️
pkg/controller/networkpolicy/store/addressgroup.go	83.01% <0.00%> (-3.78%)	⬇️
...gent/controller/networkpolicy/status_controller.go	72.60% <0.00%> (-2.74%)	⬇️
pkg/controller/networkpolicy/status_controller.go	73.20% <0.00%> (-1.97%)	⬇️
pkg/agent/util/iptables/iptables.go	36.87% <0.00%> (-1.42%)	⬇️
...kg/agent/flowexporter/connections/conntrack_ovs.go	76.36% <0.00%> (-1.22%)	⬇️
pkg/agent/memberlist/cluster.go	72.03% <0.00%> (+0.47%)	⬆️
pkg/monitor/controller.go	29.10% <0.00%> (+1.49%)	⬆️
pkg/apiserver/storage/ram/store.go	80.45% <0.00%> (+1.50%)	⬆️
... and 1 more