Fix the confusion between msec and µsec.
Merged Pull Request #380

# By Derick Rethans
* pull-request/380:
  Fix the confusion between msec and µsec.
Fixed PHP-732: Improve error message during failover

Also updated mongocollection-insert-001.phpt after PHP-700 fixes
Merged pull request #377
Improve/Fix mongobridge setup and tests
Merged pull request #378
Fix "BC Break"; Throw MongoCursorTimeoutException during failover
Fixed CS in if(.
Merged pull request #379
Silly typo, remove the trailing questionmark
Merged Pull Request #381

* pull-request/381:
  Silly typo, remove the trailing questionmark
Fix expected output of MongoCursorTimeoutException message
Merged Pull Request #382

# By Jeremy Mikola
# Via Jeremy Mikola
* pull-request/382:
  Fix expected output of MongoCursorTimeoutException message
Remove unused mongo_db_cmd() function
Added test for PHP-735
We need to apply the RP set on the _cursor_ not MongoClient here

This fixes issues where RP set on db/collection/cursor/whatever not
being properly sent over to mongos
Fixed PHP-735: Commands should inherit ReadPreferences from MongoDB and MongoCollection objects
Fixed PHP-734: Possible segfaults when error_message is not set
Fix teset after PHP-735 fix (actually setting the slaveokay flag!)