added list as reserved word for java generator

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java

@@ -122,7 +122,7 @@ public AbstractJavaCodegen() {
                 "this", "break", "double", "implements", "protected", "throw", "byte", "else",
                 "import", "public", "throws", "case", "enum", "instanceof", "return", "transient",
                 "catch", "extends", "int", "short", "try", "char", "final", "interface", "static",
-                "void", "class", "finally", "long", "strictfp", "volatile", "const", "float",
+                "void", "class", "finally", "long", "strictfp", "volatile", "const", "float", "list",
                 "native", "super", "while", "null")
         );