Fix unit tests to report output

[dhblum]

Before, #450, testing/report.py was used to generate a failure exit code if the make test_all unit test target failed. See the call to report.py in the testing makefile (https://github.com/ibpsa/project1-boptest/blob/master/testing/makefile#L254) and the exit code spec set in report.py (https://github.com/ibpsa/project1-boptest/blob/master/testing/report.py#L84). With #450 implemented, this reporting now needs to be implemented in each job, otherwise, individual tests can fail but travis doesn't know about it, as has happened in this case: https://app.travis-ci.com/github/ibpsa/project1-boptest/jobs/578820097. This issue will fix this.

@kbenne this will need to be addressed in Service too.

[dhblum]

Closed by #467.