Update dependencies
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Update travis-core
Update travis-core
Update travis-core
Update travis-core
Update travis-core
Update travis-core
Update travis-core
Switch back to travis-core master branch

https://github.com/travis-ci/travis-core/pull/404 has been merged
Merge branch 'ha-bug-gh-2902'
Relax SQL query requirements in specs

This corresponds to some extra work done when build matrix
is expanded.

See https://github.com/travis-ci/travis-core/pull/404
Update GC-related env var
Merge branch 'master' into rkh-track-user-agent

Conflicts:
	Gemfile.lock