MB-100: removed dead sasl password validation code
MB-100: removed dead sasl password validation code

Change-Id: I8b18943423be1d65bc3718d3e88bcc6da035cc7e
Reviewed-on: http://review.couchbase.org/28305
Reviewed-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

ceejatec/ns_server,vzasade/ns_server,nimishzynga/ns_server,vzasade/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,mschoch/ns_server,ceejatec/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,ceejatec/ns_server,mschoch/ns_server,daverigby/ns_server,mschoch/ns_server,membase/ns_server,mschoch/ns_server,membase/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,membase/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,membase/ns_server,ceejatec/ns_server,daverigby/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,ceejatec/ns_server