Add role::cache::text for Varnish

Change-Id: Ieb25ab3f42d6cb2f52f7799a4c3390a5b353fbc3
Add Text Varnish VCL include boilerplate

Change-Id: I30e01bef55a63f1657ae4236d1e75a2f8ea74c96
Merge "Add role::cache::text for Varnish" into production
Merge "Add Text Varnish VCL include boilerplate" into production