Adding custom java_opts for kind-voltha

Change-Id: I85e0040554c630fb6812119ebb7b353f81809d92
diff --git a/values.yaml b/values.yaml
index 3145a4a..33bb251 100644
--- a/values.yaml
+++ b/values.yaml
@@ -170,6 +170,9 @@
   atomix:
     persistence:
       enabled: false
+    java_opts: >
+      -Xmx2G
+      -XX:-UseContainerSupport
 
 # Customization for BBSIM
 bbsim: