JSCBC-458: Added N1QL profiling parameter.
JSCBC-458: Added N1QL profiling parameter.

Motivation
----------
The newest N1QL service supports specifying a specific
category of tracing to perform.

Changes
-------
Added new `profile` method to the N1qlQuery class which
allows you to specify the desired profiling mode.

Change-Id: Ic4739fe0b29849d7457cc647fd612e93257c1fe4
Reviewed-on: http://review.couchbase.org/93208
Reviewed-by: Mike Goldsmith <c43a3c67d7a1203c37ce25b098df0254011e1ce6@gmail.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

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