Fixes bug 797509 - Change how processors insert crashes into elasticsearch.

This pull request changes the way processors do insertion into elasticsearch to reflect the new stack we use. We removed SocorroSearchService and are now sending crash reports directly to elasticsearch. 

I'd like to get review from @twobraids for the processor parts, from @erikrose for the elasticsearch parts, and from anyone for the overall code quality. 

I think we also need to discuss the indexes strategy: should we have an index per day, or an index per week, or even an index per month?