Travis CI not reporting failed tests

[stevekm]

Example:
https://travis-ci.org/NYU-Molecular-Pathology/snsxt/builds/296001755

Tests are failing but Travis is still reporting a successful build because the exist status of the test script is 0

See answer here
https://stackoverflow.com/a/43266549/5359531

need to incorporate here:
https://github.com/NYU-Molecular-Pathology/snsxt/blob/master/snsxt/test.py#L16

[stevekm]

this also brings up issues with not being able to incorporate real qstat, etc., SGE commands with Travis CI tests