- Ensuring config load time is updated properly when config changes
   and is reloaded.
 - Fixed tcc 'last_nsobj_id' not defined bug
 - Removed a couple of obsolete routines (cfg_changed(), crawler_context())
Make is_running() track context and use that in tests so multiple
crawlers don't get in each other's way and the tests will run on
hpss-crawler01 with a production crawler going without messing with
the production crawler.