SERVER-42192 enabled running moveChunk tests in the stepdown concurrency suites, so it should be easier to run the moveChunk and index operations concurrency test, random_moveChunk_index_operations.js (added by SERVER-44918), in those suites as well.

To do so the following changes will likely need to be made:

• Change the moveChunk() state function to use the move chunk helper in chunk.js to handle stepdown errors
• Stop considering collMod a non-retryable command in network_error_and_txn_override.js