Moving kind-voltha sanity test from 2.5 to 2.6

Change-Id: I9f30ddcc4379f55f8f0844b1ad154a71ec1a4032
diff --git a/jjb/defaults.yaml b/jjb/defaults.yaml
index d887d32..a67c32c 100644
--- a/jjb/defaults.yaml
+++ b/jjb/defaults.yaml
@@ -79,7 +79,7 @@
     # regexp for gerrit triggers
     # list of supported branches, for branch-regexp
     all-branches-regexp: '.*'
-    supported-branches-regexp: '^(master|cord-7.0|cord-6.1|seba-1.0|voltha-2.3|voltha-2.4|voltha-2.5)$'
+    supported-branches-regexp: '^(master|cord-7.0|cord-6.1|seba-1.0|voltha-2.[0-9]+)$'
     legacy-branches-regexp: '^(cord-5.0|cord-4.1|cord-4.0)$'
     modern-branches-regexp: '^(master|cord-7.0|cord-6.1|cord-6.0|seba-1.0|voltha-2.3|voltha-2.4)$'
     platform-branches-regexp: '^(master|cord-7.0|cord-6.1)$'