Fix spelling mistake in test_images.py
Fix spelling mistake in test_images.py

Change "iamge" to "image" on lines 1089 and 1131

Closes-bug: 1488096

Change-Id: I317b7aca6a073e25206112d6125f376ec5f9fc6c

saeki-masaki/glance,openstack/glance,stevelle/glance,rajalokan/glance,takeshineshiro/glance,dims/glance,takeshineshiro/glance,klmitch/glance,openstack/glance,openstack/glance,scripnichenko/glance,akash1808/glance,klmitch/glance,rajalokan/glance,akash1808/glance,stevelle/glance,saeki-masaki/glance,scripnichenko/glance,dims/glance