Support the handling of two composite non unique fks.

[GoogleCodeExporter]

Currently we do not handle ignoring two composite non-unique fks.

<!--Errors Found During Generation:
warning 6037: Foreign key constraint 'blah' has been omitted from the storage 
model. Column 'CategoryTypeID' of table 'blah' is a foreign key participating 
in multiple relationships. A one-to-one Entity Model will not validate since 
data inconsistency is possible.

Original issue reported on code.google.com by bniemyjski on 23 Jun 2014 at 4:30

[stale]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates. This issue now has been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.