Save Merged Contact Fields for future reference

[daveb-501commons]

When merging save the merged Contact fields as a JSON blog on the contact for future reference.

The current MMA functionality will look through the merge contact and any blank fields on the master that are not blank on the merge contact will be set on the master.

For instance - this means if both have a Phone number but the phone number doesn't match the merge contact phone number won't be copied into the master contact and will be lost. Adding the merge contact fields to JSON blog allows that data to be processed later in the event of new functionality available.