Added a step in the MetadataTemplateResource which ensures that the domain is correctly set for the current user on all created MetadataTemplate instances during creation, regardless of what is in the new instance.  This is similar to project creation, and will mean that the UI will not need to include the current domain in order to create a new MetadataTemplate.

Note, this change was one line, but its comments are several.  Derp?  Herp herp derp...