adding new parameter cvmfs_env_variables (issue cvmfs/puppet-cvmfs/#8)
fix to prevent failure on empty cvmfs_env_variables
removing additional space (typo)
adding new parameter cvmfs_env_variables (issue cvmfs/puppet-cvmfs/#8)
Merge pull request #9 from HEP-Puppet/add_env_vars

Adding environmental variables to CVMFS config