Use 'system.foundation' image to bootstrap foundation node

Change-Id: I584d0cf080f647806145d98e73461169c5331129
diff --git a/tcp_tests/templates/_heat_environments/eu-cloud.env b/tcp_tests/templates/_heat_environments/eu-cloud.env
index 5b3b03b..e053283 100644
--- a/tcp_tests/templates/_heat_environments/eu-cloud.env
+++ b/tcp_tests/templates/_heat_environments/eu-cloud.env
@@ -37,6 +37,8 @@
 
   net_public: public
 
+  foundation_image: system.foundation
+
   nameservers: 172.18.208.44
   control_subnet_cidr: "10.6.0.0/24"
   tenant_subnet_cidr: "10.8.0.0/24"