Set CONFLATE_DB_PATH if not set
Set CONFLATE_DB_PATH if not set

Change-Id: Ic3c5ad5e5610e4fc1042806982a96bd524e5cb63
Reviewed-on: http://review.northscale.com/1570
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

membase/moxi,steveyen/moxi,membase/moxi,couchbase/moxi,couchbase/moxi,zbase/moxi,membase/moxi,couchbase/moxi,zbase/moxi,membase/moxi,couchbase/moxi,membase/moxi,steveyen/moxi,zbase/moxi,couchbase/moxi,steveyen/moxi,steveyen/moxi,couchbase/moxi,zbase/moxi,zbase/moxi,membase/moxi,steveyen/moxi