Fix for SR-log jobs

Change-Id: If6ccb9af88297da3627fe844547f5062686dac42
diff --git a/jjb/OnosSystemTest/onos-test-freestyle.yaml b/jjb/OnosSystemTest/onos-test-freestyle.yaml
index c535491..7dd9b9f 100644
--- a/jjb/OnosSystemTest/onos-test-freestyle.yaml
+++ b/jjb/OnosSystemTest/onos-test-freestyle.yaml
@@ -564,14 +564,9 @@
 
     <<: *test-free-init-procedure-plate
 
-    sr-version-before-previous:
-      - '1.12'
-
-    sr-version-previous:
-      - '1.13'
-
-    sr-version-current:
-      - 'master'
+    sr-version-before-previous: '1.12'
+    sr-version-previous: '1.13'
+    sr-version-current: 'master'
 
     jobs:
       - 'SR-log-storage':