added tests for guidance_group controller and added method to test helper to get org admin DMPRoadmap/roadmap#212

added initial tests for guidance_groups_controller

updated phases and templates tests to work with updated error messaging

added generic 'Unable to save your changes' message for template create/update failures

finished tests for invalid objects and added notes to have us add proper error messaging later on

added tests for saving and creating invalid templates

updated seeds to use managing institution abbreviation instead of hard-coded 'CC'. Added basic functional tests for templates controller with small adjustments to check for nils in view and controller