Show the sum of every policy's amount in /recon/async
Show the sum of every policy's amount in /recon/async

After the release of Swift ver. 2.0.0, some recon responses do not
show each policy's information yet. To make things worse, some recon
results only count on policy-0's score, therefore the total is not
shown in the recon results.

With this patch, async_pending count of recon results becomes
policy-aware. Suppose a number of async_pending files for policy-0 is 2
and a number for policy-1 is 3, recon sums up every policy's amount
as follows.

$ curl http://<host>:<port>/recon/async
{"async_pending": 5} # It showed 2 before this commit

Related-Bug: 1375332
Change-Id: Ifc88b8c9e06b9f022a926a87ed807e938e1e0412

hurricanerix/swift,notmyname/swift,wenhuizhang/swift,thiagodasilva/swift,hbhdytf/mac2,psachin/swift,aerwin3/swift,notmyname/swift,redbo/swift,williamthegrey/swift,shibaniahegde/OpenStak_swift,larsbutler/swift,dencaval/swift,bkolli/swift,openstack/swift,tipabu/swift,swiftstack/swift,prashanthpai/swift,openstack/swift,hbhdytf/mac2,clayg/swift,larsbutler/swift,notmyname/swift,matthewoliver/swift,anishnarang/gswift,bouncestorage/swift,matthewoliver/swift,dpgoetz/swift,zackmdavis/swift,smerritt/swift,openstack/swift,nadeemsyed/swift,hbhdytf/mac,swiftstack/swift,rackerlabs/swift,levythu/swift,levythu/swift,daasbank/swift,swiftstack/swift,redhat-openstack/swift,nadeemsyed/swift,maginatics/swift,dencaval/swift,anishnarang/gswift,zackmdavis/swift,wenhuizhang/swift,tipabu/swift,mjzmjz/swift,smerritt/swift,eatbyte/Swift,hbhdytf/mac,revoer/keystone-8.0.0,bradleypj823/swift,mjwtom/swift,redhat-openstack/swift,redbo/swift,gold3bear/swift,AfonsoFGarcia/swift,tipabu/swift,hurricanerix/swift,shibaniahegde/OpenStak_swift,prashanthpai/swift,iostackproject/IO-Bandwidth-Differentiation,nadeemsyed/swift,Akanoa/swift,smerritt/swift,iostackproject/IO-Bandwidth-Differentiation,mjzmjz/swift,gold3bear/swift,openstack/swift,takeshineshiro/swift,bradleypj823/swift,aerwin3/swift,Em-Pan/swift,mjwtom/swift,daasbank/swift,eatbyte/Swift,clayg/swift,Seagate/swift,clayg/swift,hurricanerix/swift,matthewoliver/swift,revoer/keystone-8.0.0,bkolli/swift,thiagodasilva/swift,AfonsoFGarcia/swift,rackerlabs/swift,hurricanerix/swift,psachin/swift,williamthegrey/swift,maginatics/swift,psachin/swift,IPVL/swift-kilo,bouncestorage/swift,hbhdytf/mac2,nadeemsyed/swift,matthewoliver/swift,psachin/swift,IPVL/swift-kilo,Akanoa/swift,notmyname/swift,hbhdytf/mac2,Em-Pan/swift,takeshineshiro/swift,tipabu/swift,dpgoetz/swift,clayg/swift,Seagate/swift,smerritt/swift