Fixes bug 872547 - Improved mapping with a list of all fields and better...

... analyzers.

@twobraids @erikrose r?

Changes in the unit tests reflect some side effects of changing the mapping. The mapping now includes almost all fields that we know, and all fields that we care about. This will be a step into allowing better behavior in supersearch, and will also serve as a base for making raw crash fields accessible in the UI.

We want to merge this before the big reindex that should happen during the next release of Socorro 67.