Fix test_monit

[bingwang-ms]

Description of PR

Summary:
test_monit began to fail with following error

exit_code = monit_status_result["rc"]
>       pytest_assert(exit_code == 0, "Monit is either not running or not configured correctly")
E       Failed: Monit is either not running or not configured correctly

The root cause is test cases running before this one will restart monit status, and it will take up to 300 seconds for monit to be reloaded.
This PR addressed the issue by adding a wait_until logic.

Signed-off-by: bingwang [email protected]

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911

Approach

What is the motivation for this PR?

This PR is to fix test_monit.

How did you do it?

This PR addressed the issue by adding a wait_until logic.

How did you verify/test it?

Verified by running test_monit after test_memory_checker, which will restart monit service.

Any platform specific information?

No.

Supported testbed topology if it's a new test case?

No.

Documentation

[yozhao101]

@bingwang-ms Thanks so much for helping me fix this bug issue. I appreciate it.