non-default data path overriden when joining cluster

Note, this has not yet been verified on 1.8

• Start the new server, and go to the web config page
• Enter a non-default path for the data location
• Select to join an existing cluster
• Hit next.

Although the node is added to the existing cluster, the data path appears to revert back to the default (/opt/membase/var/lib/membase/data) as verified with the command line tool:

/opt/membase/bin/membase server-info -c 127.0.0.1:8091

{
snip
"status": "healthy",
"storage": {
"hdd": [

{ "path": "/opt/membase/var/lib/membase/data", "quotaMb": "none", "state": "ok" }

],
"ssd": []
},