Revert "CBQE-0: fail NodeInitializeTask if info.mcdMemoryReserved == 0"

This reverts commit 6a9b40a916bc2fcb370cabc58b4959ec084627f4.

http://www.couchbase.com/issues/browse/CBQE-2314

Change-Id: Id050527d5ebd307f0094ab7f6d6f4bb0024b54f7
Reviewed-on: http://review.couchbase.org/39077
Reviewed-by: Meenakshi Goel <meenakshi.goel@globallogic.com>
Tested-by: Meenakshi Goel <meenakshi.goel@globallogic.com>