Allow special handling to preceed generic handler
Allow special handling to preceed generic handler

The IPMI session layer now, with more constants defined, catches the SOL
error and populates 'error' message.  Move the generic handler code
to come after the specific condition handler to allow things like forced
sessions to work as expected.

Change-Id: I62ab5fc16a9af631317eff78b8445b06a76b56d8

stackforge/pyghmi,benoit-canet/pyghmi,openstack/pyghmi,openstack/pyghmi