Fixes the swift Service start Command.

Added swift-init command.

Closes-Bug: #1251531

Change-Id: I81ceee4b8455407b0766e10e6fa95fdc594cc998
backport: havana
(cherry picked from commit 33c3a7e475d5633477a17e3ac19e205684534f9d)
Add config reference for the l3 metering agent

Change-Id: Idf3bfd5f0170619646b37a88f79e378107b13bfe
Partial-bug: #1202967
(cherry picked from commit 858f87413318bfbc299929fe172f0e462df17697)
Merge "Fixes the swift Service start Command." into stable/havana
Merge "Add config reference for the l3 metering agent" into stable/havana