Log failure and store -2 in case of problems with build or tests

[snadi]

If you could not run the build or test for any reason, or the repo doesn't support mvn, then store -2 (And update documentation in ReadMe or data schema description) and log a failure

https://github.com/ualberta-smr/code-owhadi-msr19/blob/1724d8a2ff6b334c0775a8498359ce892249d320/merge_excavator/code_quality.py#L33

[mkareshk]

@snadi Do you have any idea about the ways of "counting" the number of test cases? I think parsing the output of mvn test is not a good idea.

[snadi]

Unfortunately, I don't think there's a direct command you can use to give you the number of tests (At least that I know of and based on some quick searching) so I guess we have two options:

(1) grep for things in the output of mvn test
(2) count the number of @test annotations inside of java files in the test directory