Completed mapping of com.mongodb.MongoException to org.mongodb.MongoException.  Added cases for additional com exceptions that need to be thrown, and added test for the mapper.  Also made sure the new org exception is not visible in the stack trace.
Removed unnecessary Exception field
Added missing 2.x Exceptions and the mappings for them.
Refactored com Exceptions to take new exceptions in the constructors for ease of conversion.
Added missing MongoInterruptedException