update ansible to work

[naved001]

since we made changes to the database schema, the ansible script fails to run. We need to change:

1. Document that it's a good idea to run yum/apt update.
2. Somehow get git, wget and curl. (install manually or using ansible).
3. The command to bootstrap the database fails because it still tries to insert network information.
4. Relative paths have changed, so we need to update that.
5. Remove harcoded constants from the ansible files, into an environment file.
6. Update pip before installing other packages.
7. It assumes that the ceph keyring is called client.bmi.key, we should probably get this from an environment file.