Add missing class-attribute-rgx parameter

Author: mrfyda

src/main/resources/docs/description/description.json

@@ -424,6 +424,10 @@
       {
         "name": "inlinevar-rgx",
         "description": "Regular expression to match Variable type, used as part of list comprehensions and generators"
+      },
+      {
+        "name": "class-attribute-rgx",
+        "description": "Regular expression matching correct class attribute names"
       }
     ]
   },

src/main/resources/docs/patterns.json

@@ -363,6 +363,10 @@
         {
           "name": "inlinevar-rgx",
           "default": "[A-Za-z_][A-Za-z0-9_]*$"
+        },
+        {
+          "name": "class-attribute-rgx",
+          "default": "([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$"
         }
       ]
     },

src/main/resources/docs/tests/C0103.py

@@ -14,4 +14,8 @@ def good_method(bla):
 
 class GnaEme(object):
     def good_method(bla):
-        print "cool!"
+        print "cool!"
+
+class Complex:
+##Info: C0103
+    THIS_IS_REALLY_LONG_I_MEAN_ITS_MORE_THAN_THIRTY_CHARS = 53