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tell travis to test master,essex,and folsom branches

aimonb/puppet-glance,aquto/puppet-glance,mjeanson/puppet-glance,bodepd/puppet-glance,bodepd/puppet-glance,varunarya10/puppet-glance,varunarya10/puppet-glance,mjeanson/puppet-glance,aimonb/puppet-glance,TelekomCloud/puppet-glance,gwdg/puppet-glance,TelekomCloud/puppet-glance,aquto/puppet-glance,gwdg/puppet-glance