Print more info when `test_perf_database_render` transiently fails.
Print more info when `test_perf_database_render` transiently fails.

dirtycoder/opbeat_python,beniwohli/apm-agent-python,patrys/opbeat_python,beniwohli/apm-agent-python,patrys/opbeat_python,patrys/opbeat_python,dirtycoder/opbeat_python,daikeren/opbeat_python,tarkatronic/opbeat_python,dirtycoder/opbeat_python,ticosax/opbeat_python,daikeren/opbeat_python,tarkatronic/opbeat_python,beniwohli/apm-agent-python,patrys/opbeat_python,daikeren/opbeat_python,tarkatronic/opbeat_python,beniwohli/apm-agent-python,ticosax/opbeat_python,ticosax/opbeat_python