Update dependency for new webdav module

issue4703
review15181002

setup.py

@@ -43,7 +43,7 @@ if minor_version % 2:
 
 requires = ['cached-property', 'python-dateutil']
 for dep in info.get('depends', []):
-    if not re.match(r'(ir|res|webdav)(\W|$)', dep):
+    if not re.match(r'(ir|res)(\W|$)', dep):
         requires.append(get_require_version('trytond_%s' % dep))
 requires.append(get_require_version('trytond'))