CBQE-0: Fix KeyError: 'results' in viewquery task

Change-Id: Ic69fa8a99e271347cbedee8cf5679a31166a314a
Reviewed-on: http://review.couchbase.org/32763
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>