Fixes #4288: Move r30768 to v1.7 branch (MXM: do not enforce version)

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r30768 [[BR]]
MXM: do not enforce version check

- MXM uses libtool versioning scheme which is enough, no need additional in OMPI

reviewed by yossi

cmr=v1.7.5:reviewer=ompi-rm1.7
Fixes #4245: Move support for CUDA async copies into v1.7

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r30396 [[BR]]
Provide option to have synchronous copy be asynchronous with a wait.  For now,
this has to be selected at runtime.  Also fix up some error messages to have
node name in them.

r30767 [[BR]]
Fix several issues reported in ticket #4245.