Moved custom flags to the values file for ADTRAN olt adapter chart

Change-Id: I8bfaf54983b3d38f933260280afbe00402452848
diff --git a/jjb/voltha-test/voltha.yaml b/jjb/voltha-test/voltha.yaml
index 01dbddf..ef81e3f 100644
--- a/jjb/voltha-test/voltha.yaml
+++ b/jjb/voltha-test/voltha.yaml
@@ -494,7 +494,7 @@
           branch: 'voltha-2.8'
           profile: '1T8GEM'
           reinstall-olt: false
-          extraHelmFlags: "--set adapter_adtran_olt.kv_store_data_prefix='service/voltha/voltha_voltha' --set global.image_registry='10.34.90.43:443/' --set global.image_org='' --set network.netconfUserSecret='' --set adapter_adtran_olt.topics.core_topic=voltha_voltha_rwcore"
+          extraHelmFlags: "--set adapter_adtran_olt.kv_store_data_prefix='service/voltha/voltha_voltha' --set network.netconfUserSecret='' --set adapter_adtran_olt.topics.core_topic=voltha_voltha_rwcore"
           num-of-onos: '3'
           num-of-atomix: '3'
           pipeline-script: 'voltha/voltha-2.8/physical-build.groovy'