Merge pull request #104 from travis-ci/ha-bug-no-template-memoization

Do not memoize @template_list
Update gems

Most notably, `fog` to `~> 1.25.0`, so that
`Travis::Worker::VirtualMachine::Server#vsh_id` is found.
bump travis-build
Revert "bump travis-build"

This reverts commit 7730a8a9d38e3365c3544956081442be80081dc4.
Merge branch 'master' into ha-feature-fog-update
Merge branch 'ha-feature-fog-update' into staging