adtran-olt-adapter: update version from 21.5 to 23.1

* Adtran requires the usage of the adtran-olt-adapter in version 23.1
  for voltha 2.11 onwards

Signed-off-by: Jan Klare <jan.klare@bisdn.de>
Change-Id: I6b07a317b0720216cefe9b8a791fbcc1c176c52e
diff --git a/jjb/voltha-test/voltha.yaml b/jjb/voltha-test/voltha.yaml
index cf056b7..cb89be9 100644
--- a/jjb/voltha-test/voltha.yaml
+++ b/jjb/voltha-test/voltha.yaml
@@ -1241,7 +1241,7 @@
           num-of-atomix: '3'
           pipeline-script: 'voltha/voltha-2.11/physical-build.groovy'
           VolthaEtcdPort: 9999
-          openoltAdapterChart: '/home/community/adtran-21.5-voltha-2.11/voltha-adapter-adtran-olt'
+          openoltAdapterChart: '/home/community/adtran-23.1-voltha-2.11/voltha-adapter-adtran-olt'
           oltAdapterReleaseName: 'adtran-olt'
           waitTimerForOltUp: 420
           time: '19'
@@ -1261,7 +1261,7 @@
           num-of-atomix: '3'
           pipeline-script: 'voltha/voltha-2.12/physical-build.groovy'
           VolthaEtcdPort: 9999
-          openoltAdapterChart: '/home/community/adtran-21.5-voltha-2.12/voltha-adapter-adtran-olt'
+          openoltAdapterChart: '/home/community/adtran-23.1-voltha-2.12/voltha-adapter-adtran-olt'
           oltAdapterReleaseName: 'adtran-olt'
           waitTimerForOltUp: 420
           time: '19'