Fixing the maya tests so they run even when IECoreMaya has a dependency on IECoreRI.
Fixing the maya tests so they run even when IECoreMaya has a dependency on IECoreRI.

code-google-com/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx,ruschelp/cortex-vfx