Fix the fix_and_run.sh command

Change the owner of the files to prevent:

notice: (/Stage[main]/Nagios::Master/Exec[script_fix_and_run]/returns) Error: Cannot open config file '/etc/nagios3/xifi-monitoring_...
...
notice: /Stage[main]/Nagios::Master/Exec[script_fix_and_run]/returns:    ...fail!
Add a comment on suspect chmod
Assign the correct group to the nagios files
Fix the permission issue with the correct dependencies

- Fix the fix_and_run script.
- Remove commented code.
Workaround here: install custom compiled nagios 3.5.1

The old version did not start up with some configuration
(usually when we have a lot of checks).

The debs were compiled starting from the source packages of ubuntu trusty
on an ubuntu precise.
Merge pull request #6 from dancn/fix-alias

Update nagios and some workarounds