Fix Rails 2 support after config.ru reloading changes for TORQUE-819
Fix sinatra after TORQUE-891 changes for zero-downtime web deploys
Add basic zero downtime deploy spec (TORQUE-819)

For now this only checks that web runtimes reload via JMX without
downtime.
Increase the default timeout to wait for a queue to start - buildhive is SLOW
Don't hardcode the default latch wait time in destination_spec.rb
Don't assume rack/reloader starts with INITIAL now that multiple specs use that app