Get a Tor Controller connection for a tor ooniprobe did not launch.
Adds the WIP of a Tor Test Template.

This basic example enumerates Tor Exits and compares the advertised
ORPort with the IP returned by a IP proxy service.
Organize Tor Network Test tool components.
Fix circuit re-use bug; used wrong attribute.

Circuits are now properly reused.
Adapt the http_requests test for Tor Network scans.

Note, requires TrueHeaders.
Add a simple SSL Exit Scanner test
Clean up circuits at gc
Use Firefox ciphersuite
Add the idhex, not router, to report
Fix failure handlers
Simplify choosing exits.
waiting/built circuits stored in dict
Add circuit_failed handler
Add stream_closed handler
Add circuit_closed handler
Add stream_failed handler
Add stream_detach handler
Add cipher list to the report.
Refactor ssl data