add "clone for debug" option

[beav]

If there was a "clone for debug" setting during restore, that would be helpful.

Items would include:

• remove proxy settings from syncs
• disable sync plans
• disable all recurring tasks

There would likely be a couple of other items as well that could be rolled in:)

[johnpmitsch]

we can clear paused tasks as well as disabling sync plans (after restore, but before 2nd installer run)
This would work in 6.2:
foreman-rake foreman_tasks:cleanup TASK_SEARCH='label ~ *' STATES='paused' VERBOSE=true