Update .travis.yml
Update .travis.yml

py.test is supposed to only run tests found in the specified file or path, but it runs ALL.  Must use the --ignore option to exclude unwanted directories.  We only want to run unit tests upon each commit, which are located under f5/.  A future change will add in functional tests but that requires more integration work to create a VE.
F5Networks/f5-common-python,F5Networks/f5-common-python,wojtek0806/f5-common-python