Remove unnecessary javadoc from test code

[quaff]

Many javadoc of test code are redundant because method/constructor is self-described, for example:

spring-data-jpa/spring-data-jpa/src/test/java/org/springframework/data/jpa/domain/sample/User.java

Lines 125 to 134 in 699d3a2

	/**
	* Creates a new instance of {@code User} with preinitialized values for firstname, lastname, email address and roles.
	*
	* @param firstname
	* @param lastname
	* @param emailAddress
	* @param roles
	*/
	public User(String firstname, String lastname, String emailAddress, Role... roles) {

and some are erroneous, for example:

spring-data-jpa/spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/custom/CustomGenericJpaRepository.java

Lines 33 to 40 in 699d3a2

	/**
	* @param domainClass
	* @param entityManager
	*/
	public CustomGenericJpaRepository(JpaEntityInformation<T, ID> metadata, EntityManager entityManager) {
	super(metadata, entityManager);
	}

I would help if the team agreed to cleanup.

[mp911de]

I think it makes sense to clean up these bits.

[quaff]

Superseded by #3333