Plumb insecure flag to functests

The problem arises when running functests against pre-existing
clusters configured with self-signed certificates. As far as
security goes, doing that is rather useless, but it happens.
Such testing worked previously, but with the switch to Requests
in the client, we must plumb "insecure" flag. There's no other
way to do it in Requests, no environment variable, anything.

Change-Id: I94a61b60de8ee0529652c8c4a1ab9894c7cdb589
Add ability to remove subsections from /info

Change-Id: Ic881065962cf5f69f7a5b64f6e38d9e6e1f8fd18
Add Ratelimit parameters to /info

We previously registered with no parameters, added parms so they
are displayed as follows (example):

"ratelimit": {"max_sleep_time_seconds": 60.0,
"container_listing_ratelimits": [[0, 100.0], [10, 50.0], [50, 20.0]],
"container_ratelimits": [[0, 100.0], [10, 50.0], [50, 20.0]],
"account_ratelimit": 1.0}

Note that not all parameters are exposed (intentionally) via /info

Change-Id: I36c7ef15af17e3eb8ebb93429035bd06d089a945
Closes-Bug: 1308989
Merge "Add ability to remove subsections from /info"
Merge "Plumb insecure flag to functests"
Merge "Add Ratelimit parameters to /info"