Update voltha-stack with latest versions

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I7aba956aab4eb765778987e43ccbe4e40e38083b
diff --git a/VERSION b/VERSION
index 269aa9c..ff313b8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.8.3
+3.8.4
diff --git a/voltha-stack/Chart.yaml b/voltha-stack/Chart.yaml
index 5680226..68a68fe 100644
--- a/voltha-stack/Chart.yaml
+++ b/voltha-stack/Chart.yaml
@@ -34,7 +34,7 @@
 
 ## Chart version for package voltha-stack
 ##   Increment when Chart.yaml changes
-version    : "2.15.6"
+version    : "2.15.7"
 
 # -----------------------------------------------------------------------
 # NOTE: Dependencies are chart versions not component/repository version
@@ -43,19 +43,19 @@
 dependencies:
   - name       : voltha
     repository : file://../voltha
-    version    : "2.15.5"
+    version    : "2.15.6"
     condition  : voltha.enabled
   - name       : "voltha-adapter-openonu"
     repository : "file://../voltha-adapter-openonu"
-    version    : "2.15.4"
+    version    : "2.15.5"
     condition  : "voltha-adapter-openonu.enabled"
   - name       : voltha-adapter-openolt
     repository : file://../voltha-adapter-openolt
-    version    : "2.15.4"
+    version    : "2.15.5"
     condition  : voltha-adapter-openolt.enabled
   - name       : voltha-go-controller
     repository : file://../voltha-go-controller
-    version    : "2.15.3"
+    version    : "2.15.4"
     condition  : voltha-go-controller.enabled
 
 # [EOF]