Various clean up items

- Clean up after xos-migrate tests
- Remove legacy dockerfiles
- Install xos-genx from local copy in Dockerfile.client, as otherwise it
  pulls an older version from pypi as xos-api requires it.

Change-Id: Id613d269c2825e06a83cb50eef7c98125b9cff7a
diff --git a/Dockerfile.client b/Dockerfile.client
index 6d60f3e..fb649a2 100644
--- a/Dockerfile.client
+++ b/Dockerfile.client
@@ -23,6 +23,7 @@
 # Install python using pip so their dependencies are installed
 RUN pip install -e /opt/xos/lib/xos-util \
  && pip install -e /opt/xos/lib/xos-config \
+ && pip install -e /opt/xos/lib/xos-genx \
  && pip install -e /opt/xos/lib/xos-api \
  && pip freeze > /var/xos/pip_freeze_xos-client_`date -u +%Y%m%dT%H%M%S`