TESTS and GO_FLAGS Makefile vars cannot be set from command line

[jsanda]

Bug Report

Describe the bug
The TESTS and GO_FLAGS variables were introduced to give more control over unit test execution, but they currently cannot be set from the command line.

To Reproduce
Steps to reproduce the behavior:

1. Run GO_FLAGS="-v" TESTS=".*auth.*" make unit-test
2. All unit tests are run with non-verbose output

Expected behavior
I should be able to set these vars from the command line.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• Helm charts version info

1.0.0

• Helm charts user-supplied values

$ helm get values RELEASE_NAME

• Kubernetes version information:

kubectl version

• Kubernetes cluster kind:

Additional context

[jsanda]

Closing since this is not a bug.