We should use mongo orchestration more cleanly in our build system. Specifically, the following things could be done better:

-MCI cleanup for mongo orchestration happens in 'post', which isn't quite right. Not all tasks start or even install mongo orchestration. For example the 'compile' task across os's will always complain about not finding a running mongo orchestration, or not having it installed. We should only try to stop mongo orchestration if it's been started in the current task.

-SCons tries to connect to mongo orchestration when it's just building the driver. Unless you're building client tests or integration tests it shouldn't be necessary to try to connect to MO.