copy_volume should receive volume size in GB

[Ivan Kolodyazhny]

We store volume size in GB so it's confusing to receive volume size param in MB in volume_utils.copy_volume method's param

[Mitsuhiro Tanino (mitsuhiro-tanino)]

Ivan, thank you for adding this.

I fixed this problem for LVM backend temporarily at following bug but it would be better to fix root cause as you mentioned above.
https://bugs.launchpad.net/cinder/+bug/1454835

[Sean McGinnis (sean-mcginnis)]

Automatically unassigning due to inactivity.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean McGinnis (<email address hidden>) on branch: master
Review: https://review.openstack.org/198006
Reason: This review is > 4 weeks without comment, and failed Jenkins the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean McGinnis (<email address hidden>) on branch: master
Review: https://review.openstack.org/198006
Reason: This review is > 4 weeks without comment and currently blocked by a core reviewer with a -2. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and contacting the reviewer with the -2 on this review to ensure you address their concerns.

[Sean McGinnis (sean-mcginnis)]

Unassigning due to no activity for > 6 months.