Fix wrong titles for cinder quota operations

1. in 'View and Update Block Storage Quotas for a Tenant (Project)'
section, 'To update Compute service quotas' should be 'To update Block
Storage quotas for a tenant (project)';
2. to keep consistent with titles in Nova quotas operations, modify 'To
view Block Storage quotas for a tenant' to 'To view Block Storage quotas
for a tenant (project)';

Change-Id: I4b53a8eaf944ba322acf31e762c445664eab95be
Closes-Bug: #1323308