dhcp reservation creation fails when using dashed mac address

[KrisSaxton]

When run via salt:

opt/pkg/salt/bin/salt -c /opt/pkg/salt/etc/master 'dhcp01.aethernet.local' dhcp.reservation_create freesme-231 01-02-00-02-31-00-00 10.0.16.98
{'dhcp01.aethernet.local': {'count': 1,
                            'data': [['cn=freesme-231,cn=group1,cn=dhcp01-config,ou=dhcp,ou=services,o=aethernet,c=gb',
                                      {'cn': ['freesme-231'],
                                       'dhcpHWAddress': ['ethernet -34'],
                                       'dhcpOption': ['host-name "freesme-231"'],
                                       'dhcpStatements': ['fixed-address 10.0.16.98'],
                                       'objectClass': ['top',
                                                       'dhcpHost',
                                                       'dhcpOptions']}]],
                            'exit_code': 0,
                            'msg': 'Found spoke.lib.dhcp:',
                            'type': 'spoke.lib.dhcp'}}

dhcpHWAddress has value ethernet -34 instead of mac address.