test: add unit tests for stack_deployer.go

[scottlaiaws]

What type of PR is this?
bug

Which issue does this PR fix:

• Add unit tests for stack_deployer.go
• Fix e2e test build failure

What does this PR do / Why do we need it:

This PR add unit tests for stack_deployer.go and fix e2e test build failure

#274

If an issue # is not available please add repro steps and logs from aws-gateway-controller showing the issue:

Testing done on this change:

make e2etest

• [271.541 seconds]
------------------------------

Ran 6 of 6 Specs in 2329.978 seconds
SUCCESS! -- 6 Passed | 0 Failed | 0 Pending | 0 Skipped
--- PASS: TestIntegration (2330.79s)
PASS
ok      github.com/aws/aws-application-networking-k8s/test/suites/integration   2330.817s

Automation added to e2e:

N/A

Will this PR introduce any new dependencies?:

No

Will this break upgrades or downgrades. Has updating a running cluster been tested?:
N/A

Does this PR introduce any user-facing change?:

No

fix: fix build error for e2e test
test: add unit tests for stack_deployer.Deploy

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[scottlaiaws]

make presubmit output:

go mod tidy
go generate ./...
go vet ./...
go fmt ./...
go test ./pkg/... -coverprofile coverage.out
?       github.com/aws/aws-application-networking-k8s/pkg/aws   [no test files]
ok      github.com/aws/aws-application-networking-k8s/pkg/aws/services  0.461s  coverage: 2.9% of statements
?       github.com/aws/aws-application-networking-k8s/pkg/k8s   [no test files]
?       github.com/aws/aws-application-networking-k8s/pkg/model/lattice [no test files]
?       github.com/aws/aws-application-networking-k8s/pkg/runtime       [no test files]
?       github.com/aws/aws-application-networking-k8s/pkg/utils [no test files]
?       github.com/aws/aws-application-networking-k8s/pkg/utils/retry   [no test files]
?       github.com/aws/aws-application-networking-k8s/pkg/utils/ttime   [no test files]
ok      github.com/aws/aws-application-networking-k8s/pkg/config        50.377s coverage: 77.4% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/deploy        0.525s  coverage: 20.6% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/deploy/lattice        0.693s  coverage: 86.1% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/gateway       1.297s  coverage: 77.4% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/latticestore  0.770s  coverage: 73.3% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/model/core    0.711s  coverage: 40.9% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/model/core/graph      0.842s  coverage: 17.2% of statements
ok      github.com/aws/aws-application-networking-k8s/pkg/utils/log     1.113s  coverage: 0.0% of statements [no tests to run]

[coveralls]

Pull Request Test Coverage Report for Build 5394075904

• 1 of 2 (50.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 32.614%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/deploy/stack_deployer.go	1	2	50.0%

Totals
Change from base Build 5361248073:	-0.3%
Covered Lines:	3369
Relevant Lines:	10330

---

💛 - Coveralls

[zijun726911]

Go through the code with scottlaiaws offline, LGTM