Add doc entry to check partition count
Add doc entry to check partition count

An high or increasing partition count due to storing handoffs can have
some severe side-effects, and replication might never be able to catch
up. This patch adds a note to the admin_guide how to check this.

Change-Id: Ib4e161d68f1a82236dbf5fac13ef9a13ac4bbf18

clayg/swift,smerritt/swift,smerritt/swift,psachin/swift,psachin/swift,matthewoliver/swift,psachin/swift,swiftstack/swift,swiftstack/swift,hurricanerix/swift,prashanthpai/swift,redbo/swift,larsbutler/swift,tipabu/swift,openstack/swift,redbo/swift,tipabu/swift,nadeemsyed/swift,openstack/swift,matthewoliver/swift,matthewoliver/swift,openstack/swift,clayg/swift,hurricanerix/swift,prashanthpai/swift,clayg/swift,swiftstack/swift,larsbutler/swift,smerritt/swift,nadeemsyed/swift,tipabu/swift,clayg/swift,notmyname/swift,smerritt/swift,psachin/swift,notmyname/swift,tipabu/swift,nadeemsyed/swift,hurricanerix/swift,notmyname/swift,openstack/swift,nadeemsyed/swift,matthewoliver/swift,notmyname/swift,hurricanerix/swift