adding "all-branches-regexp". needed for repos with support branches

Change-Id: Iac9dba822143b49cbdc38f98619021e985dfaed7
diff --git a/jjb/defaults.yaml b/jjb/defaults.yaml
index 684e084..f323bb5 100644
--- a/jjb/defaults.yaml
+++ b/jjb/defaults.yaml
@@ -63,6 +63,7 @@
 
     # regexp for gerrit triggers
     # list of supported branches, for branch-regexp
+    all-branches-regexp: '.*'
     supported-branches-regexp: '^(master|cord-6.1|seba-1.0|cord-6.0|cord-5.0|cord-4.1|cord-4.0)$'
     legacy-branches-regexp: '^(cord-5.0|cord-4.1|cord-4.0)$'
     modern-branches-regexp: '^(master|cord-6.0|cord-6.1|seba-1.0)$'