Add missing version conversion logic in request objects
Add missing version conversion logic in request objects

This adds back logics that were missing when 'health_check' was added to
scale_in, scale_out and resize operation requests.

Change-Id: I2af5d76311587b10af216b71b8662dd4eb723ff9

openstack/senlin,openstack/senlin,openstack/senlin,stackforge/senlin,stackforge/senlin