Add TLS settings to Class['cloudera'].
Add support for installing parcels.

Added `use_parcels => false` to Class['cloudera'].  When set to `true`,
the CDH and Impala YUM repos will not be deployed nor will the RPMs be
installed.
Add a diectory filter for Geppetto.
Add support for YUM proxy, username, and password.
Merge branch 'feature/parcels' into develop