Right now, retries break in ilo driver due to server_side_retries being
an accepted kwarg in sushy.connector.Connector._op, but not this
version.
We should accept any set of args, but only pass on known-good args, as
sushy.connector.Connector._op() will pass on any unknown kwargs to
requests, which means we should not blindly pass on all kwargs.
Additionally, fixed related unit tests and some basic configuration
fixes to get linting to pass.
Change-Id: I80796cc4280a194735e6e4034d37cca4fdc97f97
fe2f9c2950