Fix a typo in format string arguments.
Fix a typo in format string arguments.

Change-Id: I95006929fee15c88da8d9b8c0dfc5cd46406a4ae

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,OSSystems/lava-server,Linaro/lava-server,OSSystems/lava-server,OSSystems/lava-server