[ONOS-7988]: Refactor Branches used in Jenkins TestON Pipelines

Change-Id: I5801715e2af8315809130c2d0fd262b304f949f4
diff --git a/TestON/JenkinsFile/dependencies/branches.json b/TestON/JenkinsFile/dependencies/branches.json
new file mode 100644
index 0000000..5be761f
--- /dev/null
+++ b/TestON/JenkinsFile/dependencies/branches.json
@@ -0,0 +1,11 @@
+{
+    "latest_branches": {
+        "onos-1.x": "1.15",
+        "onos-2.x": "2.1"
+    },
+    "support_branches": {
+        "onos-1.sb1": "1.12",
+        "onos-1.sb2": "1.14",
+        "onos-2.sb1": "2.0"
+    }
+}