fix typo
bugfixes for virt stats module functions
Check for target device in XML definiton, stopped VMs does not have
targets.
Return int for cputime_percent
Merge pull request #3255 from torhve/develop

Develop
Add new returner carbon, to push metrics directly to carbon server
Merge pull request #3256 from torhve/develop

Add new returner carbon, to push metrics directly to carbon server