ADTRAN: Update to containerized adapters.
Loading and running but still needs about a week or so of work to
catch up to where the OpenOLT/ONU containerized adapters are

Change-Id: I5522232e21dd76b3f95b4698af6c7e4cef96753d
diff --git a/env.sh b/env.sh
index ec3b52f..8f6fffb 100644
--- a/env.sh
+++ b/env.sh
@@ -27,3 +27,4 @@
 
 # add top-level voltha dir to pythonpath
 export PYTHONPATH=$VOLTHA_BASE/$VENVDIR/lib/python2.7/site-packages:$PYTHONPATH:$VOLTHA_BASE:$VOLTHA_BASE/cli:$VOLTHA_BASE/protos/third_party
+export PATH=$VOLTHA_BASE/bin:$VOLTHA_BASE/bin/k8s:$PATH