Additions to the 4.1 upgrade

Hi,

You updated the repo url to 4.1 but didn't change the necessary paths.

This pull request
1) uses the 'cloudstack-' prefixed binaries rather than the 'cloud-' ones.
2) downloads vhd-util to the correct directory /usr/share/cloudstack-common/
3) corrects the path for catalina.out

No idea if anything needs to be changed for the agent.

Thanks,
Ian