Flaky terrarest `TestOhmyglbBasicAppExample`

[ytsarev]

We have non-deterministic test case within terratest pipeline which is failing from time to time

2020-04-27T22:57:56.9670279Z TestOhmyglbBasicAppExample 2020-04-27T22:57:56Z command.go:158: 'map[app1.cloud.example.com:NotFound app2.cloud.example.com:Unhealthy app3.cloud.example.com:Unhealthy]'
2020-04-27T22:57:56.9670560Z     TestOhmyglbBasicAppExample: ohmyglb_basic_app_test.go:100: 
2020-04-27T22:57:56.9670722Z         	Error Trace:	ohmyglb_basic_app_test.go:100
2020-04-27T22:57:56.9670841Z         	Error:      	Not equal: 
2020-04-27T22:57:56.9671273Z         	            	expected: "'map[app1.cloud.example.com:NotFound app2.cloud.example.com:Unhealthy app3.cloud.example.com:Unhealthy]'"
2020-04-27T22:57:56.9671659Z         	            	actual  : "'map[app1.cloud.example.com:NotFound app2.cloud.example.com:Unhealthy app3.cloud.example.com:Healthy]'"
2020-04-27T22:57:56.9671778Z         	            	
2020-04-27T22:57:56.9671897Z         	            	Diff:
2020-04-27T22:57:56.9672149Z         	            	--- Expected
2020-04-27T22:57:56.9672263Z         	            	+++ Actual
2020-04-27T22:57:56.9672512Z         	            	@@ -1 +1 @@
2020-04-27T22:57:56.9672864Z         	            	-'map[app1.cloud.example.com:NotFound app2.cloud.example.com:Unhealthy app3.cloud.example.com:Unhealthy]'
2020-04-27T22:57:56.9673213Z         	            	+'map[app1.cloud.example.com:NotFound app2.cloud.example.com:Unhealthy app3.cloud.example.com:Healthy]'
2020-04-27T22:57:56.9673353Z         	Test:       	TestOhmyglbBasicAppExample
2020-04-27T22:57:56.9673806Z TestOhmyglbBasicAppExample 2020-04-27T22:57:56Z command.go:87: Running command kubectl with args [--namespace ohmyglb-test-n68arr delete -f