Description of problem:
Invoking the method TestRun.add_cases() ,the cases can't be added to the specific runs.
Version-Release number of selected component (if applicable):
v3.8.9-1 on test server
Steps to Reproduce:
1.Invoke the method like this:
2.then call the n.TestRun.get_test_cases(141243) or refresh the UI page to check whether this case is added to the run.
The case was not added to the run and there are no any wrong messages returned.
the case should be added to the run if the case id and run id are both right
Else,return 400 fault.
the doc shows an error parameters order. I will fix doc.
verify this bug on devel server on v3.8.10--->Pass
verify steps are same as description.