Tests

Filter out empty results from describe stacks #2546

Job	Run time
Build	36s
[k3s] demo-helmfile	37s
[localstack] demo-localstack	2m 27s
[lint] demo-context	13s
Docker Lint	18s
[mock] demo-atlantis	7s
Acceptance Tests	1m 2s
[mock] demo-component-versions	15s
[validate] demo-context	3s
[mock] demo-context	28s
[validate] demo-localstack	3s
[validate] demo-stacks	4s
[mock] demo-vendoring	15s
[validate] demo-helmfile	4s
[validate] quick-start-advanced	3s
[validate] quick-start-simple	4s
release	0s
	6m 39s

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