(QENG-1391) Use TLSv1 over SSLv3 for curl against PE

Prior to this commit, beaker was exclusively using SSLv3 against Puppet
Enterprise. Due to the recent information with POODLE, this commit updates
beaker to use TLS over SSL since we are disabling the use
of SSLv3.
Merge pull request #497 from briancain/QENG1391/master/use-tls-for-pe-curl

[UNDER REVIEW](QENG-1391) Use TLSv1 over SSLv3 for curl against PE