fixes #2680 - ensure RbVmomi::VIM::ComputeResource is loaded before our ComputeResource
(cherry picked from commit 58547fc6413965e8491d72eb308e95caa3952dff)
fixes #2680 - ensure RbVmomi::VIM::ComputeResource is loaded before our ComputeResource
(cherry picked from commit 58547fc6413965e8491d72eb308e95caa3952dff)