csfilter: allow line shift in PyLint method re-definition message

See Zuul failure in:
https://pagure.io/copr/copr/pull-request/1749#

Closes: https://github.com/kdudka/csdiff/pull/17

Author: praiskup

src/csfilter.cc

@@ -121,6 +121,10 @@ MsgFilter::MsgFilter():
 
         // "... Redefining name 'desc' from outer scope (line 10)" etc.
         d->addMsgFilter(checker, " \\((?:imported )?line [0-9]+\\)$", "");
+
+        // ".. method already defined line 199"
+        d->addMsgFilter(checker, " method already defined line [0-9]+$",
+                                 " method already defined");
     }
 
     // "__coverity_strcmp" -> "strcmp", etc.

tests/csdiff/diff-misc/11-pylint-copr-json-new.err

@@ -12132,6 +12132,18 @@
         }
       ]
     },
+    {
+      "checker": "PYLINT_WARNING",
+      "events": [
+        {
+          "file_name": "coprs_frontend/tests/test_apiv3/test_projects.py",
+          "line": 219,
+          "column": 4,
+          "event": "E0102[function-redefined]",
+          "message": "TestApiV3Permissions.test_perms_set_sends_emails: method already defined line 199"
+        }
+      ]
+    },
     {
       "checker": "PYLINT_WARNING",
       "events": [

tests/csdiff/diff-misc/11-pylint-copr-json-old.err

@@ -12168,6 +12168,18 @@
         }
       ]
     },
+    {
+      "checker": "PYLINT_WARNING",
+      "events": [
+        {
+          "file_name": "coprs_frontend/tests/test_apiv3/test_projects.py",
+          "line": 222,
+          "column": 5,
+          "event": "E0102[function-redefined]",
+          "message": "TestApiV3Permissions.test_perms_set_sends_emails: method already defined line 202"
+        }
+      ]
+    },
     {
       "checker": "PYLINT_WARNING",
       "events": [