Update Heat template for environment

* update docker_ee_url default value
* always cache ucp images

Related-Prod: PRODX-39329
Change-Id: Ifb8f075d3148fa3421f99437284c8c781cb91180
diff --git a/de/heat-templates/env/main-wrkr5-rack1-cmp2-rack2-cmp2.yaml b/de/heat-templates/env/main-wrkr5-rack1-cmp2-rack2-cmp2.yaml
index 8654005..d34b485 100644
--- a/de/heat-templates/env/main-wrkr5-rack1-cmp2-rack2-cmp2.yaml
+++ b/de/heat-templates/env/main-wrkr5-rack1-cmp2-rack2-cmp2.yaml
@@ -19,7 +19,7 @@
   main_worker_flavor: 'system.compact.openstack.control.ephemeral'
   rack01_cmp_flavor: 'system.compact.openstack.control.ephemeral'
   docker_ucp_image: docker-dev-kaas-local.docker.mirantis.net/lcm/docker/ucp:3.3.3
-  docker_ee_url: https://storebits.docker.com/ubuntu
+  docker_ee_url: https://repos.mirantis.com/ubuntu
   docker_ee_release: stable-19.03
   private_floating_interface: 'ens4'
   default_interface: 'ens3'