Fixes #5467: implement openvz support for rudder 2.11
Merge pull request #470 from peckpeck/bug_5467/implement_openvz_support_for_rudder_2_11

Fixes #5467: implement openvz support for rudder 2.11
Fixes #5477: implement openvz support for rudder 2.11
Fixes #5476: Apply patch about oracle linux OS name in fusion
Merge pull request #472 from VinceMacBuche/bug_5476/patch_oracle_linux

Fixes #5476: Apply patch about oracle linux OS name in fusion
Fixes #5464: Make the rudder-upgrade script able to report errors intead of silently failing
Merge pull request #469 from Kegeruneku/bug_5464/int/5464_make_the_rudder_upgrade_script_more_verbose

Fixes #5464: Make the rudder-upgrade script able to report errors intead...
Merge pull request #473 from peckpeck/bug_5477/implement_openvz_support_for_rudder_2_11

Fixes #5477: implement openvz support for rudder 2.11