AMBARI-6522. Build for Ubuntu is broken (aonishuk)
AMBARI-6401. Kerberos_setup.sh should use 'set -e' to fail early (aonishuk)
AMBARI-6524. Assign Master functionality doesn't work. (akovalenko)
AMBARI-6523. Ambari Agent install on SLES prints jenkins warning (aonishuk)
AMBARI-6525 Unable to install cluster after coming back to step 1 and selecting different stack version. (Max Shepel via ababiichuk)