Switch apt proxy

Switch apt proxy server due to bugginess in old apt proxy.

Change-Id: I73840e51bdb134f18fff9c6ef2a4e744d18663ee
Issue-ID: INT-586
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/deployment/heat/onap-oom/env/tlab/onap-oom.env b/deployment/heat/onap-oom/env/tlab/onap-oom.env
index a77da73..33ba83d 100644
--- a/deployment/heat/onap-oom/env/tlab/onap-oom.env
+++ b/deployment/heat/onap-oom/env/tlab/onap-oom.env
@@ -2,7 +2,7 @@
 
   ubuntu_1604_image: "Ubuntu 16.04 LTS Generic"
 
-  apt_proxy: 192.168.31.204:3142
+  apt_proxy: 192.168.31.204:8000
   docker_proxy: 192.168.31.204:5000
 
   rancher_vm_flavor: m5.xlarge