Atomic ptr cache data is transient

This pull request is a fix for the failure in the pat1 "other" test.  Data that should have been declared transient was not.  This problem can be seen in IB CMSSW_7_1_ROOT6_X_2014-05-19-1400 and prior IB's.  In later IB's this error is hidden by other problems.
Please merge this as soon as convenient, unless there are problems.
This should also propagate to the cms-sw:CMSSW_7_2_ROOT6_X branch.