* Eddy reactivates las112

* Add a role that adds the DHCP server and a failover server
* Use ansible-vault to encrypt the MAC-address mapping
* Fixes issue 7

Fedora 28 does not provide python2-firewalld which is needed by the
ansible module firewalld. Therefore these roles would fail. See issue #28 for this

This is not a fix, but a dirty hack to let the other tasks complete

* Not all variables were included, because there is no group sensitive
* Now the vault is included as described in the best practices for
vaults

* Add the SSH key as a variable
* Encrypt the file containing this variable

project-manager -> gethmann

* To get the tool audit2allow for managing selinux issues

(cherry picked from commit 56bd3290)