Description : 

The legacy code was able to report individual (already exists) error when creating a batch of new cm handles

using batch save this functionality got compromised and need to be improved to handles such error again

possibly solution:
catch exception on batch save and resave the failed batch using individual save statement and then using the original error handling for each failure

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Method Affected : 

inventoryPersistence.saveCmHandleBatch(newCmHandles);
inventoryPersistence.saveCmHandleStateBatch(compositeStatePerCmHandleId);

• Catch Exception , Retry Batch Elements Individually and then which still fails , collect in the batch version of the exception.
• Rest Response while exception to be streamlined as before.
• Cm handle to be moved to LOCKED state when Module Sync fails.

Note : Rest Response just applies for registration. (as we dont expect any exception at REST layer)