Set severity of Pylint info messages to "Low" instead of "Medium". Fi…

…xes issue jenkinsci#49

src/main/java/hudson/plugins/violations/types/pylint/PyLintParser.java

@@ -131,6 +131,7 @@ PyLintViolation getPyLintViolation(String line) {
      *
      * <pre>
      * The different message types are:
+     * (I) information, e.g. if some violations have been locally disabled
      * (C) convention, for programming standard violation
      * (R) refactor, for bad code smell
      * (W) warning, for python specific problems
@@ -146,6 +147,7 @@ PyLintViolation getPyLintViolation(String line) {
     private void setServerityLevel(Violation violation, String messageType) {
 
         switch (messageType.charAt(0)) {
+        case 'I':
         case 'C':
             violation.setSeverity(Severity.LOW);
             violation.setSeverityLevel(Severity.LOW_VALUE);