Use regex to match TestON branches in QA-check-style job

Change-Id: I68e523351de172256609f18a28a563aaf1cd8bc5
diff --git a/jjb/OnosSystemTest/onos-test-freestyle.yaml b/jjb/OnosSystemTest/onos-test-freestyle.yaml
index 7dd9b9f..c59c458 100644
--- a/jjb/OnosSystemTest/onos-test-freestyle.yaml
+++ b/jjb/OnosSystemTest/onos-test-freestyle.yaml
@@ -231,10 +231,8 @@
            - project-compare-type: PLAIN
              project-pattern: '{project}'
              branches:
-               - branch-compare-type: ANT
-                 branch-pattern: '**/master'
-               - branch-compare-type: ANT
-                 branch-pattern: '**/onos-1.[11-20]'
+               - branch-compare-type: REG_EXP
+                 branch-pattern: '(master|onos-1.(1[3-9]|[2-9][0-9]))'
     wrappers:
       - lf-infra-wrappers:
          build-timeout: 1800