If a Clarity user having run the Import Integration Mappings job, does not have Rally Workspace Administrator rights, the Integration mappings field (and its values) will not be created in Rally.
Steps to reproduce are:
The Integration Mappings field will be successfully created in Rally if the Clarity user running the Import Integration Mappings job also has Rally Workspace Administrator rights.
The Synchronize Mapped Information job should be run by a Clarity user that also has Rally Project Administrator rights needed to create the Rally Portfolio Items in the appropriate Rally Project.