Enabling the FT code breaks compilation (again). This series
tries to fix the compiler errors. This is again only fixing
the compiler errors without any warranty that the result
might actually support FT again.
The FT code used barrier mechanisms which have been removed
with aec5cd08bd8c33677276612b899b48618d271efa. This patch replaces
all those different barriers with opal_pmix.fence(NULL, 0);
I am not sure this is completely correct but at least a starting
point for a review.
1c5a8df724