COMP: RHEL6 default compiler needs clean typedefs

The default RHEL6 compiler: gcc (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4)
fails with a errsors similar to "error: reference to ‘VersorTransformType’ is ambiguous"
when typedefs are shadowing each other.

Removed duplicate typedefs from several locations.