FIX - Adding Group to GenericWork

HYDRASIR - 510 #close

I didn't write an automated test for this. But I followed these steps for testing:

1. login 
2. click on '+' and select 'More Options' 
3. click on 'Add New' for Generic Work 
4. I entered title "Title 1" 
5. started typing in the Groups field and selected the Group "Group - 1" from the autocomplete 
6. check the contributor license agreement 
7. click on 'Create Generic work' 

This navigated to the GenericWork show view. From there: 
8. click on 'Edit this Generic Work' 

'Group - 1' link was listed in the Groups field.