Adds a functional/convergence tests for os-swift including keystone,
galera, memcache and rabbit.
Swift testing infrastructure consists of:
1 service container /w keystone, galera, rabbit, memcached.
4 storage hosts (each with 2 disks)
1 proxy container.
This fixes a few issues to ensure the functional tests will run, such as
delegating sysctl net.ipv4.tcp_tw_reuse task to physical host, since we
are running swift storage inside containers for the purposes of this
test, and the containers won't have access to make this change.
Fixes the developer_mode settings which were incorrect.
Change-Id: Ie1dfaf666cbbac9fe78edd0a9218cec790c8c4d2
Closes-Bug: #1553967