GitHub pull requests - Travis CI

[Standa Laznicka]

Hello,

Please note that due to the problems Travis CI has with their internet 
provider, the builds of our PRs tend to fail: 
https://www.traviscistatus.com/

Also, since they are switching from `pep8` to `pycodestyle` binary, you 
need to rebase your pull requests on current master and wait with 
backports until the respective `.travis.yaml` backports are pushed:

ipa-4-6: https://github.com/freeipa/freeipa/pull/1199
ipa-4-5: https://github.com/freeipa/freeipa/pull/1201

Sorry for the inconvenience,
Standa