Add debug test logging to troubleshoot segfault

Author: tmi

pytest.ini

@@ -2,3 +2,6 @@
 ; addopts=-s --cov climetlab --verbose --cov-report xml --cov-report html
 ; addopts=--no-cov
 addopts=-s --verbose
+log_cli = true
+; for some reason, "DEBUG" was not accepted to log_cli_level so we use 10
+log_cli_level = 10