Do not clean docs directory

The docs/source has been introduced by change-id:
Ide5f7d980a294c7a9f8a3decaed0939f1c239934, but clean.sh try to clean
whole docs direcotry, which is not right.

Meanwhile, there are directories in FILES_TO_CLEAN variable, which means
rm -f will not work. We need to use rm -rf.

Change-Id: I4e10d70d5638ce7e7a9215f5bd848422aa90aad3
Closes-Bug: #1335399
Add keystone middleware to devstack

Add the keystonemiddleware repository to devstack to support testing
with tempest and stable branches.

Change-Id: Ib635465e6568d9cd51d6e432ec8b8633a27d19ce
Merge "Do not clean docs directory"
fix trove image addition

the previous addition to trove was done in a way that it was not
possible to discover from nodepool. This fixes our ability to do
that, especially with non-default on services.

Change-Id: I8ca682354e0d4e2eb9cf05f40c6dd783de1c6355
Merge "Add keystone middleware to devstack"
Merge "fix trove image addition"
Merge branch 'master' into csr1kv_for_routing_juno