Reduce sleep that was used to work around TFTP problems
Reduce sleep that was used to work around TFTP problems

Change-Id: I5dec611d26c98e1224fece8f1c321dfcffe36ef4

eprasad/instack-undercloud,bcrochet/instack-undercloud,rdo-management/instack-undercloud,bcrochet/instack-undercloud,dpkshetty/instack-undercloud,dmsimard/instack-undercloud,eprasad/instack-undercloud,dmsimard/instack-undercloud,dpkshetty/instack-undercloud,rdo-management/instack-undercloud