am dc9b8fd6: am e2a3fb8c: Fix lookup query throwing exception for null displayNames.

Merge commit 'dc9b8fd636e22b71b7ef36eb94afd010a43121c9'

* commit 'dc9b8fd636e22b71b7ef36eb94afd010a43121c9':
  Fix lookup query throwing exception for null displayNames.