Reverting dev image for ADTN olt adapter and temporarily removing ADTN ONT from tests

Change-Id: If19d6c84757662d1e74ba4e407b6f858b3a6d457
diff --git a/kubernetes-configs/voltha/dt-berlin-pod-gpon-adtran.yml b/kubernetes-configs/voltha/dt-berlin-pod-gpon-adtran.yml
index 745815b..4e84a14 100644
--- a/kubernetes-configs/voltha/dt-berlin-pod-gpon-adtran.yml
+++ b/kubernetes-configs/voltha/dt-berlin-pod-gpon-adtran.yml
@@ -26,7 +26,7 @@
   adapter_adtran_olt:
     registry: "10.34.90.43:443/"
     repository: "voltha-adtran-adapter"
-    tag: "1.8.0.dev1"
+    tag: "1.7.0"
 #  onos:
 #    repository: "andreacampanella/voltha-onos"
 #    tag: "app-update-sadis"