Fix swift memcache and device properties

All controller nodes are added into the list of swift devices and into
the list of memcache servers. This patch also removes swift storage nodes
from the list of memcache servers - I don't think that each storage node
should run proxy server (also swift-storage element doesn't depend on
swift-proxy).

Change-Id: Idb2ce2e2050fb84d8f8b564626b20e7b059fd685
Merge "Fix swift memcache and device properties"