Add retry logic for specified errors

[JasonDV]

We want to allow the user to specify the type of error and retry behavior.

The request object is the MergeRequest class.

• The request object should allow the user to specify a retry count
• The request object should allow the user to specify a retry delay
• The request object should allow the user to specify the type of exceptions to activate retry behavior.

The retry logic should be in the Merge method of the MergeQueryObject class.