Generate licenses directly using the mac address

see intended usage [here](https://github.com/open-license-manager/open-license-manager/issues/102)

`
/root/openLM/open-license-manager/install/bin/lccgen license issue --valid-from 20200804 --valid-to 20200903 -s 08:00:27:57:de:bd -p /root/openLM/open-license-manager/projects/DEFAULT -o /root/openLM/open-license-manager/projects/DEFAULT/licenses/openlm-client.lic
`