Switch SSL loadbalancing to sh scheduler

This is not optimal, but it's better than 'wrr' given the current
scenario with pybal, ipvsadm, and our LVS kernels.  Should reduce
renegotiations considerably, other than spike events when a server
is downed or upped by pybal.

Change-Id: I296ca2f8a6a5e135c3b97c892241acbbfc868d96