The code was moved to c/common so use that instead. Also add tests for
the new pasta_options config field. However there is one outstanding
problem[1]: pasta rejects most options when set more than once. Thus it is
impossible to overwrite most of them on the cli. If we cannot fix this
in pasta I need to make further changes in c/common to dedup the
options.
[1] https://archives.passt.top/passt-dev/895dae7d-3e61-4ef7-829a-87966ab0bb3a@redhat.com/
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
