If instance user is not root, try to execute commands at instance using sudo/su by default

[ws-kimmo-helsing]

Currently none of the commands in euinstance.py are tried to be run using sudo/su. So in case your instance user is not root, the tests will fail miserably.

[nephomaniac]

Thanks kto. 'I think' there was some final work to be done in the sshconnection class to allow this to work across the board. Some OS/images were failing when using sudo in the last round of testing due to an error(s) which gets lumped in with stdout. This work was started, but I'm not 100% sure where this was left off. I opened #252 to track the remaining work to be done.
A possible/temporary workaround for testing cloud features while using an image that doesn't permit root login is to enable root login via user-data in the instance run request. For example see:
https://github.com/eucalyptus/eutester/blob/testing/eucaops/ec2ops.py#L76

Thanks,
-M

[ws-kimmo-helsing]

Thanks for your comment @bigschwan. Maybe this change can then be implemented when the sshconnection class has been fixed.