Bug 1059686 - Remove excess newlines in test_utils.py
Bug 1059686 - Correct the name of the leak error search term test

The current test is checking the extraction of the search term for the
leak case, not the standard test error case.
Bug 1059686 - Add search term tests for pipe-delimited log error lines
Bug 1059686 - Add tests for the search term blacklist
Bug 1059686 - Add tests for the search term full error line fall-back

Test that the full error line is used as a fall-back search term if no
test name was found, or the name found was in the blacklist.
Bug 1059686 - Add test for truncating test name style search terms