Correct swift proxy service name

Swift proxy service is named swift-proxy on ubuntu distribution, and
openstack-swift-proxy on suse and redhat. But there are some places
use incorrect name for service operations, they should be fixed.

Change-Id: I784e2c290833592cda7e1a2de737787fd739baee
Closes-Bug: #1293901
Closes-Bug: #1293907
backport: havana
(cherry picked from commit d29fba92ba1ad087621e56b4171165c7952b1626)
Merge "Correct swift proxy service name" into stable/havana