ipmi: catch SdBusErrors on bus call failures

Now sdbusplus call and call_noreply can throw an SdBusError exception.
This code changes from checking .is_method_error() to catching the
exception.

Issue: 4
Change-Id: I07bbe5dbbd91d72ca75eeb14861d56aae5f3afed
Signed-off-by: Patrick Venture <venture@google.com>
1 file changed