Adding Puppet 2.7.21 to travis file
Adding Puppet 2.7.21 to travis file

huit/puppet-splunk,huit/puppet-splunk,tfhartmann/puppet-splunk,tfhartmann/puppet-splunk,huit/puppet-splunk,excessivedemon/puppet-splunk,huit/puppet-splunk,excessivedemon/puppet-splunk,excessivedemon/puppet-splunk,tfhartmann/puppet-splunk,huit/puppet-splunk,excessivedemon/puppet-splunk,tfhartmann/puppet-splunk,tfhartmann/puppet-splunk,excessivedemon/puppet-splunk