[FIX] gunicorn update error with gevent

see benoitc/gunicorn#1823

cmdb/interface/gunicorn.py

@@ -104,7 +104,7 @@ def run(self, queue):
             arbiter_process.join()
 
         except RuntimeError as e:
-            CMDB_LOGGER.critical(e.message)
+            CMDB_LOGGER.critical(e)
             sys.exit(1)
 
     @staticmethod

requirements-dev.txt

@@ -0,0 +1,43 @@
+alabaster==0.7.10
+asn1crypto==0.24.0
+attrs==18.1.0
+Babel==2.5.3
+certifi==2018.4.16
+cffi==1.11.5
+chardet==3.0.4
+click==6.7
+cryptography==2.2.2
+docutils==0.14
+Flask==1.0.2
+Flask-Breadcrumbs==0.4.0
+Flask-Menu==0.7.0
+gevent==1.3.7
+greenlet==0.4.15
+gunicorn==19.9.0
+idna==2.6
+imagesize==1.0.0
+itsdangerous==0.24
+Jinja2==2.10
+jwcrypto==0.4.2
+MarkupSafe==1.0
+more-itertools==4.1.0
+packaging==17.1
+pluggy==0.6.0
+py==1.5.3
+pycparser==2.18
+pycrypto==2.6.1
+pycryptodomex==3.6.1
+Pygments==2.2.0
+pymongo==3.6.1
+pyparsing==2.2.0
+pytest==3.5.1
+pytz==2018.4
+requests==2.18.4
+six==1.11.0
+snowballstemmer==1.2.1
+Sphinx==1.7.4
+sphinx-rtd-theme==0.4.0
+sphinxcontrib-websupport==1.0.1
+termcolor==1.1.0
+urllib3==1.22
+Werkzeug==0.14.1