Ceph

In ceph-detect-init/run-tox.sh and in ceph-disk.sh pip install pip >= 6.1 requires network access. If there is no network it's not an issue if the pip version is recent enough (CentOS 7, Ubuntu 14.04). Otherwise it will fail the test (CentOS 6.5, Ubuntu precise). install-deps.sh must prepare a minimal virtualenv with a recent pip version along with the wheelhouse to cope with that.

It will have an impact when the make check bot runs older distributions. As long as the tests are run with network access, it does not have a negative impact.