bad error when failing to connect to the device #209
Description
When we can't connect to the device we get
Can't call method "subsystem" on an undefined value at /usr/share/perl5/vendor_perl/GRNOC/NetConf/Device/Brocade/MLXe/5_8_0.pm line 68.
We should detect that we failed to connect and not attempt to create the channel / subsystem. Better logging would be useful.