MB-10061 fix behavior of RAM Quota Settings
MB-10061 fix behavior of RAM Quota Settings

- maxRamMegs should show per node value, not total
- per node ram should be calculated by dividing total by the number
  of nodes with active cluster membership, not all of the nodes

Change-Id: I96a4499d6e16abb000c9424c109d8fb8e7967e18
Reviewed-on: http://review.couchbase.org/35019
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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