Auto update current module version to latest

[travis-sobeck]

As far as I can tell, there is no way to get it to update any currently installed module to whatever the latest version is. yes I am aware are required/max version params but the problem with those is that you have to constantly update the DSC and then go and touch every server. Even if you use a pullserver you still have to touch all the DSC files. I want the DSC to be written once and have it keep all the modules listed up-to-date all the time (well within 'ConfigurationModeFrequencyMins' anyways).