refactored accessroles properties to exist on the node they are relative...

https://www.pivotaltracker.com/s/projects/684825/stories/67557532

-Adding accessroles to filesystem federated nodes failed as the rbacl and assignment subnodes could not be created through the connector. ThisPR contains refactoring that eliminates the subnodes and puts the principal and role properties directly on the node they apply to in the form:
principal1 - <1 principal>
role1 - <0.n roles>
princple2 - <1 principal>
role2 - < 0.n roles>
etc..

This enables the use case of fine grained access restrictions on federated nodes (ex: one public directory; one private directory).