Fix the typo for 'VimNotFoundException'
Fix the typo for 'VimNotFoundException'

Change-Id: Id42865b38040368d879ec446d07e02f267e6acae
Closes-Bug: #1586472

stackforge/tacker,trozet/tacker,openstack/tacker,openstack/tacker,zeinsteinz/tacker,stackforge/tacker,priya-pp/Tacker,priya-pp/Tacker,zeinsteinz/tacker,trozet/tacker,openstack/tacker