Add update to Directory Heap

This MR is preparation for a following MR. We want to be able to add directories back to the directoryHeap if we don't add all the chunks that need repair to the uploadHeap. Normally we can just push the directory back onto the directoryHeap but with uploads the directory that the file is being uploaded to might already be in the directoryHeap. In this case we want to be able to update the health of the directory in the heap and make sure that the directoryHeap reorders.

Works on #3554 (closed)