CIMI - Add support for $expand on cloudEntryPoint
Addresses Jira DTACLOUD-502
Changes needed to adapt to using a hash to contain all root entry
point, vs the acts_as_root_entity method.
Refactor service/cloud_entry_point.rb based on input from Michal Fojtik.
Huge Thanks! Michal Fojtik!
CIMI - Remove credentialTemplates from CEP COLLECTIONS.
       Use ruby style hash iteration on CEP COLLECTIONS.
       Fix typos uncovered during testing.

       These changes address review feedback from Michal Fojtik.