Fix memory problem due to double deletion of ControlSet that was causing testControllers to fail in debug mode.
Fix memory problem due to double deletion of ControlSet that was causing testControllers to fail in debug mode.

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@6094 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core