fix error parsing and params in allure report (#8641)

Author: iddqdex

ydb/tests/olap/lib/ydb_cli.py

@@ -61,8 +61,9 @@ def _try_extract_error_message(stderr: str) -> str:
             return stderr[begin_pos:end_pos].strip()
 
         try:
-            if not YdbCluster.wait_ydb_alive(300, path):
-                return YdbCliHelper.WorkloadRunResult(error_message='Ydb cluster is dead')
+            wait_error = YdbCluster.wait_ydb_alive(300, path)
+            if wait_error is not None:
+                return YdbCliHelper.WorkloadRunResult(error_message=f'Ydb cluster is dead: {wait_error}')
 
             json_path = yatest.common.work_path(f'q{query_num}.json')
             qout_path = yatest.common.work_path(f'q{query_num}.out')

ydb/tests/olap/load/conftest.py

@@ -65,7 +65,7 @@ def _get_duraton(stats, field):
             allure.attach(result.stderr, 'Stderr', attachment_type=allure.attachment_type.TEXT)
         for p in ['Min', 'Max', 'Mean', 'Median']:
             if p in stats:
-                allure.dynamic.parameter(p, stats[p])
+                allure.dynamic.parameter(p, f'{int(stats[p])} ms')
         error_message = ''
         success = True
         if not result.success: