add new sphinx infra ec2 adresses for testing

@loicgasser @gjn @AFoletti @cedricmoullet 

Hello
I have configured the new sphinx ec2 adresses in the buildout_xxx.cfg
We should do some tests on the new sphinx infrastructure before we will switch the haproxy/elb.
https://github.com/geoadmin/service-sphinxsearch/pull/79
Thanks Marcel