adds toString on generated ParameterizedType

It eases the debugging when parameterized types are created using
the Types.newParameterizedType factory method.

restx-common/src/main/java/restx/common/Types.java

@@ -57,6 +57,46 @@ public boolean equals(Object obj) {
				}
				return false;
			}

			@Override
			public String toString() {
				StringBuilder sb = new StringBuilder();
				Type ownerType = getOwnerType();
				if (ownerType != null) {
					if (ownerType instanceof Class) {
						sb.append(((Class) ownerType).getName());
					} else {
						sb.append(ownerType.toString());
					}

					sb.append(".");
					if (ownerType instanceof ParameterizedType) {

						sb.append(rawType.getName().replace(((Class) ((ParameterizedType) ownerType).getRawType()).getName() + "$", ""));
					} else {
						sb.append(rawType.getName());
					}
				} else {
					sb.append(rawType.getName());
				}

				if (arguments != null && arguments.length > 0) {
					sb.append("<");
					boolean first = true;

					for (Type current : arguments) {
						if (!first) {
							sb.append(", ");
						}
						sb.append(current.toString()); // getTypeName() in jse8
						first = false;
					}

					sb.append(">");
				}

				return sb.toString();
			}
		};
    }