OPEN - task 2: Sometimes, the image executor fails to load the URL 
http://github.com/fserena/GLORIAServices/issues/issue/2

Image URL Retrieve Executor algorithm fixed.
OPEN - task 2: Sometimes, the image executor fails to load the URL 
http://github.com/fserena/GLORIAServices/issues/issue/2

Now the reservation id and actual username always is stored, no matter
if the URL is recovered on time.