mtl_btl_ofi_rcache_init() initializes patcher which should only take
place things are single threaded. OFI providers may start spawn threads,
so initialize the rcache before creating OFI objects to prevent races.
Authored-by: John L. Byrne <john.l.byrne@hpe.com>
Signed-off-by: Harumi Kuno <harumi.kuno@hpe.com>
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