1.5.1 prep.
Merge pull request #328 from mhaskel/1.5.1-prep

1.5.1 prep.
Adds check to params.pp if lab-release is not installed
Adds spec test

If lab-release is not installed, then the end user sees a confusing/ vague message
Error: Unsupported lsbdistid () at /modules/apt/manifests/params.pp:52
It is common for docker containers to not include this package by default

After fix, the user sees a friendlier message if lab-release is not installed
Error: Unable to determine lsbdistid, is lsb-release installed? at /modules/apt/manifests/params.pp:52
Prepare a 1.5.2 release.
Merge pull request #331 from apenney/152-release

Prepare a 1.5.2 release.
Merge remote-tracking branch 'upstream/1.5.x'
Merge pull request #334 from mhaskel/1.5.x-merge

1.5.x merge
Merge pull request #329 from spuder/spuder/lsbdist

Adds check to params.pp if lab-release is not installed