use correct init.d script name
initialize a new connection per-use

Previously, I was initializing a spacewalk connection at startup and reusing it
for all calls. This didn't work since katello_notification is a long running
process; spacewalk would reap the session and we'd get errors like this:

Fault: <Fault -1: 'redstone.xmlrpc.XmlRpcFault: unhandled internal exception: Could not find session with id: 53'>

Instead, create a new connection every time we want to talk to spacewalk. I
verified with 'lsof' that this does not keep old connections open.
Merge pull request #28 from beav/new-conns

New conns