K8s manifest files updated to use docker tag 7 instead of latest

Change-Id: I5cbec8d6c4aed6612121391254f9f7e4d8fa0e6c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/docker/osm_pods/light-ui.yaml b/installers/docker/osm_pods/light-ui.yaml
index 20cb5af..e4c6284 100644
--- a/installers/docker/osm_pods/light-ui.yaml
+++ b/installers/docker/osm_pods/light-ui.yaml
@@ -46,7 +46,7 @@
     spec:
       containers:
       - name: light-ui
-        image: opensourcemano/light-ui:latest
+        image: opensourcemano/light-ui:7
         envFrom:
         - secretRef:
             name: lwui-secret