fix(NODE-3393): snapshot time not applied if distinct executed first #2908
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Description
NODE-3393, NODE-3394
This PR started out as a fix to our spec runner which was selectively passing in sessions instead of applying them to all operations. Fixing the last test revealed a bug in the original snapshot session reads implementation: the
atClusterTime
from the server response was not applied to the session if the first operation executed against it wasdistinct
. This PR includes the fix for that issue.