Some legacy Tor versions (0.3.5 and earlier) have microdescriptor
download bugs. Chutney triggers those bugs by verfying early, and
rapidly reconnecting to the SOCKSPort (#33598).

So chutney waits for a minimum amount of time after launching the
network (65 seconds on 0.3.5 and earlier), regardless of bootstrap
status or directory info distribution.

We also change the unchecked descriptor wait time to:
  * 10 seconds for microdesc downloads, and
  * 30 seconds for onion services to publish their descriptors.

Fixes bug 33615.