Update .travis.yml to exclude Python 2.6 on 0.10.x
Review Request #7918 — Created Jan. 29, 2016 and submitted
Djblets 0.10.x is no longer compatible with Python 2.6, so running tests
on Python 2.6 is going to continue to result in failures. We now only
test 0.10.x on Python 2.7.
Tool: Pyflakes Ignored Files: .travis.yml Tool: PEP8 Style Checker Ignored Files: .travis.yml