Refactor method names of instance provisioning

nc-123
Typo

nc-123
Fix bug in test name
Fix method names of instance provisioning

nc-123
Merge branch 'develop' into feature/nc-123

Conflicts:
	nodeconductor/iaas/tests/test_provisioning.py
Fix imports

nc-123
Merge branch 'feature/nc-123' into 'develop'

Feature/nc 123