Changes: * add pretty-tox script * add tempest-lib library in test-requirements for formatting subunit output. It's needed for pretty-tox script * sort test-requirements in alphabetical order Change-Id: I8b3d1e95d4ff6a1cb3aa8a96c916bb73e552778c
Changes: * add pretty-tox script * add tempest-lib library in test-requirements for formatting subunit output. It's needed for pretty-tox script * sort test-requirements in alphabetical order Change-Id: I8b3d1e95d4ff6a1cb3aa8a96c916bb73e552778c