[config] Follow gevent deprecated code

New gevent release 1.3 removed old deprecated wsgi code [1] used by
config unit test framework.
As that 1.3 gevent version also break the kazoo library [2], we restrict
our unit test framework to use precedent version until kazoo fix [3]
is released.

[1] http://www.gevent.org/changelog.html#b2-2018-05-03
[2] python-zk/kazoo#505
[3] python-zk/kazoo@257b589

Closes-Bug: #1771644

Conflicts:
	src/config/api-server/requirements.txt

Change-Id: Ic3df0c9036ff9b1e063e3e6f333506af807e41cf

src/config/api-server/requirements.txt

@@ -2,7 +2,7 @@ cfgm_common
 vnc_api
 sandesh
 sandesh-common
-gevent==1.1a2
+gevent<1.3  # removed when kazoo fix released https://github.com/python-zk/kazoo/commit/257b58961f7ddd9db04d6efa070739a1b0404487
 geventhttpclient==1.0a
 pycassa>=1.7.2
 netaddr>=0.7.5

src/config/common/tests/test_common.py

@@ -33,7 +33,7 @@
 import novaclient
 import novaclient.client
 
-import gevent.wsgi
+import gevent.pywsgi
 import uuid
 from pysandesh import sandesh_logger
 
@@ -738,7 +738,7 @@ def setUpClass(cls, extra_mocks=None, extra_config_knobs=None, db=None):
         #cov_handle.start()
 
         cfgm_common.zkclient.LOG_DIR = './'
-        gevent.wsgi.WSGIServer.handler_class = FakeWSGIHandler
+        gevent.pywsgi.WSGIServer.handler_class = FakeWSGIHandler
 
         cls.orig_mocked_values = setup_mocks(cls.mocks + (extra_mocks or []))
 

src/config/common/tests/test_utils.py

@@ -3,7 +3,7 @@
 #
 import gevent
 import gevent.queue
-import gevent.wsgi
+import gevent.pywsgi
 import gevent.monkey
 gevent.monkey.patch_all()
 import os
@@ -59,7 +59,7 @@ def _print(cls):
             print "\n"
 # class FakeApiConfigLog
 
-class FakeWSGIHandler(gevent.wsgi.WSGIHandler):
+class FakeWSGIHandler(gevent.pywsgi.WSGIHandler):
     logger = logging.getLogger('FakeWSGIHandler')
     logger.addHandler(logging.FileHandler('api_server.log'))
     def __init__(self, socket, address, server):