Move the textsvc ip from text to text-varnish

This implies that traffic coming from the SSL/IPv6 protoproxy
termination servers goes to Varnish now, instead of Squid.

Change-Id: I4a80d91c572c22971552e050d6feef1a86a43ae3
Merge "Move the textsvc ip from text to text-varnish" into production