Lookup user full names on the fly only once during change query

Instead of loading the full AccountState for each user that appears
in search result data, load only the Account object once. This is
faster in the cold-cache case, or when the cache is sized too small
to hold all records.

Change-Id: I4d335c6158bab4c36b7b5d8c154fdeebb5f63ae9
1 file changed