Merge pull request #49 from INFN-Catania/master

Tomcat is OK
changed the default port of the testing machines
Merge branch 'master' of https://github.com/AAROC/ansible-for-grid
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
testing travis ansible ssh connection with new port
Fixed ansible installation for travis, trying to add known hosts
Fixed ansible installation for travis, trying to add known hosts
Splitting variable specific to the host