SERVER-47898 Advancing lastDurable irrespective of lastApplied

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• Closed

SERVER-81918 Remove the extra call to set lastDurable opTime in oplog applier batch finalizer

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• Closed

SERVER-83092 Eliminate the unnecessary majority check in wait for write concern

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• Closed

SERVER-83182 Avoid the delay in reporting self opTimes due to the constraint of at most one in-flight updatePosition request

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• Closed

SERVER-85870 Avoid waking up ready waiters twice when updating lastDurable opTime

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• Closed