ORION-145 #comment As per Tyler's request, the new API endpoints which obtain AttributeInstance and AttributeDefinition objects based on a given Channel are relocated to the ChannelResource, with addresses like /channels/{id}/attributeDefinitions.

Also, some queries in the ChannelResource called the get ChannelDAO.get(String) function twice as often as was necessary, and have been modified to reduce the number of DAO calls.
Formatting standardized across two folders using reformat (accidentally).