Address issues found by new pylint 2.5.0
* fix multiple exception-escape
* fix function signatures of DsInstance start/stop/restart
* silence f-string-without-interpolation
* fix too-many-function-args in host plugin
Fixes: https://pagure.io/freeipa/issue/8297
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Stanislav Levin <slev@altlinux.org>