Include URL in error message
Include URL in error message

When the processor can't load a URI it logs a message, but the
message does not include the URI that was a problem, which makes
troubleshooting difficult.

Change-Id: I96533a924f7b450eb41cf738de8f4064f7089316

openstack/stackalytics,Code-Fly/stackalytics,dliu2015/stackalytics_zanata,Mirantis/stackalytics,0xf2/stackalytics,Mirantis/stackalytics,danielmellado/stackalytics,openstack/stackalytics,dliu2015/stackalytics_zanata,danielmellado/stackalytics,openstack/stackalytics,nihilifer/stackalytics,0xf2/stackalytics,Code-Fly/stackalytics,stackforge/stackalytics,danielmellado/stackalytics,dliu2015/stackalytics_zanata,mohitsethi/stackalytics,mohitsethi/stackalytics,openstack/stackalytics,Code-Fly/stackalytics,Mirantis/stackalytics,mhharsh/stackalytics,mhharsh/stackalytics,nihilifer/stackalytics,0xf2/stackalytics,mohitsethi/stackalytics,AlexanderYAPPO/stackalytics,0xf2/stackalytics,Solinea/stackalytics,mhharsh/stackalytics,stackforge/stackalytics,nihilifer/stackalytics,AlexanderYAPPO/stackalytics,Solinea/stackalytics,AlexanderYAPPO/stackalytics,stackforge/stackalytics,Solinea/stackalytics