Revert "Add sleep between image detach"
Revert "Add sleep between image detach"

This reverts commit 02325904f6db3dba53d463336a2842429719a4cb.

Further changes will be made in Nova code.
mcloudv/fuel-ostf,mcloudv/fuel-ostf,stackforge/fuel-ostf,eayunstack/fuel-ostf,eayunstack/fuel-ostf,stackforge/fuel-ostf