btl/uct: fix default exclusivity (was too high) #13031
Merged
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The uct btl should always loose to btl/sm for shared memory peers. This requires that the exclusivity be set below MCA_BTL_EXCLUSIVITY_HIGH (the exclusivity of btl/sm). The uct btl had its exclusivity set to MCA_BTL_EXCLUSIVITY_HIGH which is incorrect. This commit updates the exclusivity to the intended value.