MB-8663: implemented just_validate for replication settings
MB-8663: implemented just_validate for replication settings

Change-Id: I86d07e128160f49cdfc12b207162d78f62472a4f
Reviewed-on: http://review.couchbase.org/28353
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

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