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.
This is an old patch (r26226) from two years ago that somehow went directly into the 1.6 branch without first entering the trunk. Hence, the problem it fixed still remains in the trunk, and in the 1.7 series as a regression :-(

Thanks to Paul Hargrove for tracking it down.

RM-approved

cmr=v1.7.4:reviewer=ompi-gk1.7