conpaas frontend installation script: give DISK_TARGET the same default value as OS_ROOT
conpaas frontend installation script: give DISK_TARGET the same default value as OS_ROOT


ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas