Update Travis CI so that it only runs the tests.all.SherlockDetectTests. There are always failures in the coverage tests because one site or the other ends up having problems connecting.

While the CI tests will not do complete coverage, at least they will test something.

.travis.yml

@@ -17,7 +17,7 @@ before_script:
   # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
   - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 script:
-  - python -m unittest tests.all --buffer --verbose || true
+  - python -m unittest tests.all.SherlockDetectTests --buffer --verbose || true
 notifications:
   on_success: change
   on_failure: change  # `always` will be the setting once code changes slow down