JSCBC-823: Fixed serialization of views docid fields.
JSCBC-823: Fixed serialization of views docid fields.

Motivation
----------
The document id fields for startkey/endkey in view queries
are not intended to be JSON serialized as the startkey/endkey
are themselves.

Changes
-------
Removed the JSON serialization from the startkey/endkey document
id fields.

Change-Id: Ieb8f4b08be0e061f6beceda04f4e3fe2a401b386
Reviewed-on: http://review.couchbase.org/c/couchnode/+/141509
Reviewed-by: Charles Dixon <e13bf4498b4994e133fd3586350658dc4a59329a@gmail.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

brett19/couchnode,couchbase/couchnode,brett19/couchnode,couchbase/couchnode,couchbase/couchnode,couchbase/couchnode,brett19/couchnode