More error output if update() in foxx manager fails.
More error output if update() in foxx manager fails.

This is a temporary output to track down the continuous testing
problems.

aurelijusb/arangodb,aurelijusb/arangodb,nekulin/arangodb,nvoron23/arangodb,nekulin/arangodb,aurelijusb/arangodb,abaditsegay/arangodb,pekeler/arangodb,nvoron23/arangodb,abaditsegay/arangodb,pekeler/arangodb,aurelijusb/arangodb,nvoron23/arangodb,mujiansu/arangodb,aurelijusb/arangodb,kkdd/arangodb,pekeler/arangodb,abaditsegay/arangodb,abaditsegay/arangodb,pekeler/arangodb,mujiansu/arangodb,abaditsegay/arangodb,nvoron23/arangodb,kkdd/arangodb,nekulin/arangodb,kkdd/arangodb,aurelijusb/arangodb,nvoron23/arangodb,mujiansu/arangodb,pekeler/arangodb,razvanphp/arangodb,razvanphp/arangodb,pekeler/arangodb,nekulin/arangodb,aurelijusb/arangodb,mujiansu/arangodb,razvanphp/arangodb,nvoron23/arangodb,kkdd/arangodb,kkdd/arangodb,mujiansu/arangodb,kkdd/arangodb,razvanphp/arangodb,abaditsegay/arangodb,pekeler/arangodb,abaditsegay/arangodb,pekeler/arangodb,abaditsegay/arangodb,pekeler/arangodb,kkdd/arangodb,kkdd/arangodb,nvoron23/arangodb,nekulin/arangodb,nekulin/arangodb,kkdd/arangodb,pekeler/arangodb,mujiansu/arangodb,razvanphp/arangodb,nvoron23/arangodb,aurelijusb/arangodb,mujiansu/arangodb,nvoron23/arangodb,nekulin/arangodb,nvoron23/arangodb,nekulin/arangodb,razvanphp/arangodb,mujiansu/arangodb,mujiansu/arangodb,aurelijusb/arangodb,razvanphp/arangodb,razvanphp/arangodb,mujiansu/arangodb,razvanphp/arangodb,nekulin/arangodb,kkdd/arangodb,abaditsegay/arangodb,nekulin/arangodb,aurelijusb/arangodb,abaditsegay/arangodb,razvanphp/arangodb