roles: make xo and virtualbox part of common
core: create new playbook , common for all environments and update runansible
Remove virtualbox specific playbook
Remove unsed files
Remove vars on bios version
Remove VirtualBox
Remove role xo because is included in core
Rename dxs-common
spec: added spec file
docs: updated rpm building procedure and common playbook
Merge pull request #42 from migonzalvar/feature-spec-4

Create rpm package for the DXS simplifying installation