warn about removing target repo

.travis.rosinstall

@@ -1,3 +1,6 @@
 - git:
     uri: https://github.com/ros/std_msgs.git
     local-name: ros/std_msgs
+- git:
+    uri: https://github.com/ros-industrial/industrial_ci.git
+    local-name: industrial_ci

industrial_ci/src/tests/source_tests.sh

@@ -89,7 +89,8 @@ esac
 # download upstream packages into workspace
 if [ -e $CATKIN_WORKSPACE/src/.rosinstall ]; then
     # ensure that the target is not in .rosinstall
-    (cd $CATKIN_WORKSPACE/src; $ROSWS rm $TARGET_REPO_NAME 2> /dev/null || true)
+    (cd $CATKIN_WORKSPACE/src; $ROSWS rm $TARGET_REPO_NAME 2> /dev/null \
+     && echo "$ROSWS ignored $TARGET_REPO_NAME found in $CATKIN_WORKSPACE/src/.rosinstall file. Its source fetched from your repository is used instead." || true) # TODO: add warn function
     $ROSWS update -t $CATKIN_WORKSPACE/src
 fi
 # TARGET_REPO_PATH is the path of the downstream repository that we are testing. Link it to the catkin workspace