update travis-core for the dalli connection pool chagnes
update core for dalli conn pool changes
Merge branch 'master' of https://github.com/travis-ci/travis-api
Merge branch 'master' of https://github.com/travis-ci/travis-api

update travis-core, and lock down bunny for now

Conflicts:
	Gemfile.lock
bundle update for a core build matrix fix