Update mme, spgw image in control plane chart

SGW:
  spgw image update to fix config update crashes
  helm chart update to enable upf failure based on hearbeat failure
  helm chart update to correct qos profile name

MME image update to fix memory leak

Change-Id: I0e345b3eb0ebd4a6c041888a753b559b1d0344b3
diff --git a/VERSION b/VERSION
index a3df0a6..f8d7147 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.8.0
+0.8.0-dev