Fix user group and log directories for 10gen/local

Closes #35

Handle logpath correctly based on packages being used.  Also ensure that
logpath is created.

Fix dbpath based on packages being used.  Also make sure the path is
created.

Ensure dbpath and log directory exist before service starts.

Add dependency on stdlib >= 2.2.0

puppet-lint fixes
Merge branch 'hubspotdevops-logpath_dbpath_ensure' of github.com:hogepodge/puppetlabs-mongodb into hubspotdevops-logpath_dbpath_ensure

Conflicts:
	manifests/params.pp