[skip ci]Moving package importing to the top (#7802)

Signed-off-by: yanliang567 <yanliang.qiao@zilliz.com>

tests/python_client/testcases/test_e2e_20.py

@@ -5,6 +5,7 @@ from base.client_base import TestcaseBase
 from common import common_func as cf
 from common import common_type as ct
 from common.common_type import CaseLabel
+from utils.util_log import test_log as log
 
 prefix = "e2e_"
 
@@ -13,7 +14,6 @@ class TestE2e(TestcaseBase):
     """ Test case of end to end"""
     @pytest.mark.tags(CaseLabel.L2)
     def test_milvus_default(self):
-        from utils.util_log import test_log as log
         # create
         name = cf.gen_unique_str(prefix)
         t0 = time.time()