Update to match changes to libfabric mode bits

Remove reference to FI_WRITE_COHERENT and rename
FI_PROV_MR_KEY.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Remove len parameter from fi_cq_readerr call

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Merge pull request #71 from shefty/master

Update against PR #329 big set of random updates