remove six in venus/common/utils.py, add urlib3 in requirement.txt

Change-Id: Idba7784b938fcb4b409fbdf1d5e0cedb672baeda

requirements.txt

@@ -26,8 +26,17 @@ six>=1.9.0
 SQLAlchemy>=1.2.19 # MIT
 sqlalchemy-migrate>=0.9.6
 PyMySQL>=0.7.11
-elasticsearch>=5.0.0,<6.0.0
-apscheduler # MIT License
+elasticsearch>=7.10.1
+apscheduler>=3.6.3
 paste>=3.0.2
 webob>=1.8.5
 lxml>=4.4.0
+
+stevedore>=3.3.0
+Routes>=2.5.1
+eventlet>=0.30.0
+greenlet>=0.4.17
+urllib3>=1.24.2
+retrying>=1.3.3
+argparse>=1.4.0
+setuptools>=39.2.0

venus/common/utils.py

@@ -15,7 +15,6 @@
 """Implementation of Utils."""
 
 import json
-import six
 import urllib3
 
 from oslo_log import log as logging
@@ -39,5 +38,5 @@ def request_es(url, method, data=None):
         return resp.status, resp.data.strip()
 
     except Exception as e:
-        LOG.error(_LE("request es, catch exception:%s"), six.text_type(e))
+        LOG.error(_LE("request es, catch exception:%s"), str(e))
         return 0, None