Fixes exception in '--generate-conf-file'
Fixes exception in '--generate-conf-file'

When '--generate-conf-file' option is given, the program continues
running after the creation of the configuration file instead of
stop the execution process.
RHOSINFRA-306

redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed