This commit adds support for fedora.
It introduces a params namespace class
to hold data differences between ubuntu and fedora.
It also moves the xfs packages into their own class (swift::xfs)
This commit updates the spec tests so that they should work.
- the ssh module that they depend on had introduced a dependency on
the operatingsystem fact
- tests had not been updated to reflect using xinetd and not the service
to run the rsync daemon
- update travis-ci to include the xinetd module
