[ot] python/qemu: ot.pyot.executer: fix late variable definition issue

_build_test_command may throw an exception before 'pre' context is actually executed.

Signed-off-by: Emmanuel Blot <[email protected]>

Author: rivos-eblot

python/qemu/ot/pyot/executer.py

@@ -192,10 +192,10 @@ def run(self, debug: bool, allow_no_test: bool) -> int:
                         'UTFILE': basename(test),
                     })
                     self._log.info('[TEST %s] (%d/%d)', test_name, tpos, tcount)
+                    context = 'pre'
                     exec_info = self._build_test_command(test)
                     exec_info.test_name = test_name
                     vcplogfile = self._log_vcp_streams(exec_info)
-                    context = 'pre'
                     exec_info.context.execute(context)
                     context = 'with'
                     tret, xtime, err = qot.run(exec_info)