old_contents: from user import (
      User, Project, ResearchGroup, AccessPrivilege,
      IdentityProvider, Application, Certificate,
      CloudProvider, StorageAccess, Bucket,
      ComputeAccess, UserToBucket,
      AuthorizationProvider, S3Credential,
      HMACKeyPair, HMACKeyPairArchive)
  
new_contents: from user import (
      User, Project, ResearchGroup, AccessPrivilege,
      IdentityProvider, Application, Certificate,
      CloudProvider, StorageAccess, Bucket,
      ComputeAccess, UserToBucket,
      AuthorizationProvider, S3Credential,
      HMACKeyPair, HMACKeyPairArchive, ProjectToBucket)
  
subject: add table model to import on module