fixes Bug 958120 (v72) - added ability for collector to use submitted crash_id

to help synchronize crashes between prod and staging, give the collector the option to accept and use the UUID/crash_id submitted along with the crash.  

The production crashmovers will sumbmit crashes to staging  at the same time that they submit to HBase and RabbitMQ.  Since by the time they get to the crashmover, they've already got a UUID/crash_id assigned to them, that id will be sent to staging, too.  The staging collectors will have the option turned on to accept that crash_id instead of making a new one.

With that in place, crashes in prod and staging will be synchronized.