Check that passing `--cert` as a command line option works, for
this we use real working certificates because this will actually
be parsed by requests.
This script is intended to be called between "run-koji-container"
and "run-builder". It will copy the kerberos keytabs out of the
temporary directory generated by "run-koji-container" as well as
copying the SSL/TLS certificates from host to the share dir so
that the plugin ca use it to authenticate itself to composer.
This will create the a certificate authority (CA) and then create
a cert for composer and another one for the worker. The worker
one can also be used by the koji plugin.
The configuration file is needed to get subjectAltName working.
