[FEAT] Offline mode for iseries or VE migration

[dwigley]

Is your feature request related to a problem? Please describe.
Would like more choices for offline system than VELOS and rSeries.

Describe the solution you'd like
Currently I only see VELOS and rSeries devices as offline destinations. Would it be possible to add addtional options like VE and iSeries Hardware and then select a TMOS version?

Describe alternatives you've considered
Looks like it will sort of work if I don't choose an Offline Destination BIG-IP it will read the destination it seems. I haven't done any testing if it just thinks every destination is F5OS based or not.

Additional context

[rjouhann]

Filed internal Jira SOLUTIONS-5766 (also same request as #47)

[rjouhann]

I will close this request as a duplicate of #47