Possibility to enable or disable integrated services

[kenstershiro]

First use case is WISP integration. Survey admins should be able to enable or disable the WHISP integration for a given Job
There will be other integrations to add in future, such as GeoID.

[kenstershiro]

@vittorino would you be able to look at this one next time you get a chance please?

[rfontanarosa]

related to #1537