Update copyContentExclusionList to be set to "meta" instead of "/meta"

The updateService was setting the variable copyContentExclusion to the value of "/meta". The HibachiUtilityService was then trying to compare this value to a list of names generated by the directoryList function which just had the name as "meta". Because the value for copyContentExclusion was just hardcoded I just removed the unneeded "/" which fixes the problem.