Fix drb weirdness
Created by: myronmarston
Fix DRb specs that are failing for me locally.
As the comment explains, I have had to configure my network
adapter in a non-standard way, and it causes
IPSocket.getaddress(Socket.gethostname) to raise an error
for me.
A couple of the DRb specs were failing as a result. The use of
return from ensure caused the error to be ignored (the fact
that local_drb was not set caused it to return false). This was
confusing, and using return from ensure is a horrible practice. I have refactored to avoid the issue, rescuing
errors explicitly.