* Add commands index to command datastore.
Add simple test for commands index
Add commands index endpoint
(cherry picked from commit 4e2a2a2)
* Add handler for GET /mdm/commands
(cherry picked from commit ae71b8f)
* Added Find() method to commands datastore so that the request that matches a response can be retrieved by the connect service.
Added Find() method to command service
(cherry picked from commit ebceb28)
* Fix globally scoped vars in command datastore test suite
* groob prefers inline definition of struct members.
* Uppercase CommandUuid
