update ceilometermiddleware sample target
update ceilometermiddleware sample target

current tests target storage.api.request meter. this meter is
being deprecated as part of the initiative to represent measurement
data as samples and non-measurement data as events[1]. this is to avoid
unnecessary calculations where volume is hardcoded to volume=1.
the correct meter derived from an upload notification from the
middleware should be storage.objects.incoming.bytes

[1] I654f657dd36967ad3ec99bbe06209e7745432e12

Change-Id: I8443ab9c1dc813bf0cc36f5195887f74e72f5859
sebrandon1/tempest,Tesora/tesora-tempest,tudorvio/tempest,nunogt/tempest,LIS/lis-tempest,bigswitch/tempest,alinbalutoiu/tempest,pczerkas/tempest,Tesora/tesora-tempest,NexusIS/tempest,roopali8/tempest,tonyli71/tempest,cisco-openstack/tempest,pczerkas/tempest,redhat-cip/tempest,JioCloud/tempest,Juraci/tempest,flyingfish007/tempest,dkalashnik/tempest,sebrandon1/tempest,vedujoshi/tempest,roopali8/tempest,dkalashnik/tempest,nunogt/tempest,flyingfish007/tempest,xbezdick/tempest,xbezdick/tempest,vedujoshi/tempest,rakeshmi/tempest,varunarya10/tempest,pandeyop/tempest,openstack/tempest,Juniper/tempest,akash1808/tempest,manasi24/tempest,manasi24/jiocloud-tempest-qatempest,bigswitch/tempest,zsoltdudas/lis-tempest,Juniper/tempest,pandeyop/tempest,hayderimran7/tempest,openstack/tempest,zsoltdudas/lis-tempest,rakeshmi/tempest,hayderimran7/tempest,tudorvio/tempest,izadorozhna/tempest,LIS/lis-tempest,masayukig/tempest,akash1808/tempest,tonyli71/tempest,izadorozhna/tempest,manasi24/tempest,alinbalutoiu/tempest,JioCloud/tempest,redhat-cip/tempest,Juraci/tempest,manasi24/jiocloud-tempest-qatempest,cisco-openstack/tempest,NexusIS/tempest,masayukig/tempest,varunarya10/tempest