Bug 1427598 - Remove legacy index options
Bug 1427598 - Remove legacy index options

`not_analyzed` is a hold over from the string data type.  This was
removed when we moved to using the low-level elasticsearch library.

KWierso/treeherder,KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder,edmorley/treeherder