Do not initialize FS Watchers related to discovery in the constructor

[karrtikr]

Expose an activate method in the python environments api.

[eleanorjboyd]

Any status update here @karrtikr, saw something got merged which mentioned this.

[karrtikr]

No updates, the associated PR made a patch fix and is what introduced the issue.

[eleanorjboyd]

this should be replaced now with the envs ext