add way to specify individual download sources

Author: dothebart

jenkins/common/evaluate_force.sh

@@ -9,5 +9,9 @@ if test -n "$SOURCE"; then
         RTA_ARGS+=(--source "$SOURCE" --other-source "$SOURCE")
     fi
 else
-    RTA_ARGS+=(--remote-host 172.17.4.0)
+    if test -n "$OLD_SOURCE$NEW_SOURCE"; then
+        RTA_ARGS+=(--old-source "$OLD_SOURCE" --new-source "$NEW_SOURCE")
+    else
+        RTA_ARGS+=(--remote-host 172.17.4.0)
+    fi
 fi