Add verification to handle image retreival exception, change test duration
Add verification to handle image retreival exception, change test duration

Change-Id: I787c7c2096687fed6bc412151993b80c8bb84a39

mcloudv/fuel-ostf,eayunstack/fuel-ostf,eayunstack/fuel-ostf,mcloudv/fuel-ostf,stackforge/fuel-ostf,stackforge/fuel-ostf