Problem Statement/Rationale

Currently, if any --mode option besides `insert` is provided, mongoimport sets maintainInsertionOrder to true and numInsertionWorkers to be 1 (it will ignore the --numInsertionWorkers and --maintainInsertionOrder values provided by the user.) It does this here.

Steps to Reproduce

N/A

Expected Results

mongoimport should return an error for the following criteria if the mode != insert:

• if numInsertionWorkers != 1
• if maintainInsertionOrder != true

Actual Results

mongoimport doesn't throw an error and silently sets these values. This is pretty confusing.