Volume deletion task for removing temp and migrated volumes
Create snapshot from volume
Improve volume deletion task
Task for cloning volumes
Base volume creation task for differen cases

Base create task provides event that reports volume creation. Two creation tasks
based off it: volume creation from Glance image and volume cloning.
Use volume ID as argument to migrate detached volume
Add migration of attached volumes
[WIP] Server volumes migration
Pass block device mapping to server boot call

Block device mapping gathered from volumes migration flows and passed to
server boot task.
Merge remote-tracking branch 'origin/master' into cinder-resources
Fix typo
Merge branch 'cinder-resources' of https://github.com/MirantisLabs/pumphouse into cinder-resources

Conflicts:
	pumphouse/tasks/volume.py
[WIP] Fix various issues in volume migration tasks
Update tests for volume migration tasks
Merge remote-tracking branch 'origin/cinder-resources' into cinder-resources
Require server suspended before cloning volume for migration
Make dependencies dashed lines in flow dump
Wait_for snapshot.get()
DeleteSourceVolume
Merge branch 'cinder-resources' of https://github.com/MirantisLabs/pumphouse into cinder-resources
Add volumes support in tests for server migration tasks