Description of configuration options for tripleo

Configuration option = Default value	Description
[hardware]
readonly_user_name = ro_snmp_user	(StrOpt) SNMPd user name of all nodes running in the cloud.
readonly_user_password = password	(StrOpt) SNMPd password of all the nodes running in the cloud
url_scheme = snmp://	(StrOpt) URL scheme to use for hardware nodes