Infrastructure

Currently a salt run gives:

[WARNING ] Top file merge strategy set to 'merge' and multiple top files found. Top file merging order is undefined; for better results use 'same' option
[WARNING ] State for file: /root/.setup_state/initial - Neither 'source' nor 'contents' nor 'contents_pillar' nor 'contents_grains' was defined, yet 'replace' was set to 'True'. As there is no source to replace the file with, 'replace' has been set to 'False' to avoid reading the file unnecessarily.
[WARNING ] /usr/lib/python2.7/dist-packages/salt/utils/templates.py:73: DeprecationWarning: Starting in 2015.5, cmd.run uses python_shell=False by default, which doesn't support shellisms (pipes, env variables, etc). cmd.run is currently aliased to cmd.shell to prevent breakage. Please switch to cmd.shell or set python_shell=True to avoid breakage in the future, when this aliasing is removed.

[WARNING ] /usr/lib/python2.7/dist-packages/salt/states/git.py:460: DeprecationWarning: The 'force' argument to the git.latest state has been deprecated, please use 'force_clone' instead.

[WARNING ] State for file: /root/.byobu/.always-select - Neither 'source' nor 'contents' nor 'contents_pillar' nor 'contents_grains' was defined, yet 'replace' was set to 'True'. As there is no source to replace the file with, 'replace' has been set to 'False' to avoid reading the file unnecessarily.
[WARNING ] State for file: /etc/postfix/main.cf - Neither 'source' nor 'contents' nor 'contents_pillar' nor 'contents_grains' was defined, yet 'replace' was set to 'True'. As there is no source to replace the file with, 'replace' has been set to 'False' to avoid reading the file unnecessarily.
~

We should change that, so that the run is normally free of warnings.