openscap: Convert profile to str before .lower()
openscap: Convert profile to str before .lower()

It defaults to None, so fails.
We need it to default to None for queryEnvKey - if we default e.g. to an
empty string, queryEnvKey will not ask.

Change-Id: Ifcbe7bdf7119a5bd3fc870858d8366250fc559b8
Signed-off-by: Yedidyah Bar David <e7f2f616ce8817ad893bbeaad3e942e94c69d323@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup