fix for #604, added description from annotations

Author: fehguy

modules/swagger-servlet/src/main/scala/com/wordnik/swagger/servlet/config/ServletReader.scala

@@ -51,7 +51,7 @@ class ServletReader extends ClassReader with ClassReaderUtils {
                 val allowableValues = toAllowableValues(param.allowableValues)
                 Parameter(
                   param.name,
-                  None,
+                  Option(param.value),
                   Option(param.defaultValue).filter(_.trim.nonEmpty),
                   param.required,
                   param.allowMultiple,