MB-19513: Use the converted index storage parameter in cluster init
MB-19513: Use the converted index storage parameter in cluster init

On the command line we have users specify slightly different versions
of the index storage parameter that we then convert to the real
server accepted parameter. We need to make sure we use the server
converted parameter when setting the index storage setting.

Change-Id: I28f6c1cdd9c573aeaac422cf245091aeb1973b1d
Reviewed-on: http://review.couchbase.org/63765
Reviewed-by: Eben Haber <d1abc94d70526bfcf3e4b0ce727cb9a6fbb52a3a@couchbase.com>
Tested-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

couchbase/couchbase-cli,couchbase/couchbase-cli