hs-test: use relative paths for docker volumes

Type: test

Change-Id: I9d5c15662e50ceea08d2ccc653db36c5e3df869e
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
diff --git a/extras/hs-test/topo-containers/nginxProxyAndServer.yaml b/extras/hs-test/topo-containers/nginxProxyAndServer.yaml
index bac6a2d..cc6b780 100644
--- a/extras/hs-test/topo-containers/nginxProxyAndServer.yaml
+++ b/extras/hs-test/topo-containers/nginxProxyAndServer.yaml
@@ -1,7 +1,7 @@
 ---
 volumes:
   - volume: &shared-vol-proxy
-      host-dir: /tmp/shared-vol-proxy
+      host-dir: "$HST_VOLUME_DIR/shared-vol-proxy"
 
 containers:
   - name: "vpp-proxy"