resolve bloom failure for moveit_resources_prbt_ikfast_manipulator_pl…

…ugin

when non-resolvable keys are given in <conflict>/<replace> fields,
bloom will fail to continue.
That's not necessarily bad behavior, but it breaks in this case.

rosdep.yaml

@@ -40,6 +40,11 @@ cython:
 bfl:
  ubuntu:
  - liborocos-bfl-dev
+# this package does not exist (and shouldn't, because it was moved to moveit-resources)
+# but it's still referenced as conflicting with moveit_resources
+prbt_ikfast_manipulator_plugin:
+ ubuntu:
+ - ros-one-prbt-ikfast-manipulator-plugin
 # broken in roseus for now
 #euslisp:
 # ubuntu: