Replace J2EE with Java EE

String with version 5 the name of Java Platform, Enterprise Edition
changed from J2EE to Java EE. However a lot of the documentation still
uses the term J2EE.

This commit includes the following changes:

 * replace J2EE with Java EE where appropriate

This is not a blind search and replace. The following occurrences
remain unchanged:

 * references to old J2EE releases, most notably 1.3 and 1.4.
 * references to "Expert One-On-One J2EE Design and Development"
 * references to "Core J2EE patterns"
 * XML namespaces
 * package names

Issue: SPR-14811
See gh-1206

spring-context/src/test/java/org/springframework/tests/mock/jndi/SimpleNamingContextBuilder.java

@@ -35,7 +35,7 @@ import org.springframework.util.ClassUtils;
  * configure JNDI appropriately, so that {@code new InitialContext()}
  * will expose the required objects. Also usable for standalone applications,
  * e.g. for binding a JDBC DataSource to a well-known JNDI location, to be
- * able to use traditional J2EE data access code outside of a J2EE container.
+ * able to use traditional Java EE data access code outside of a Java EE container.
  *
  * <p>There are various choices for DataSource implementations:
  * <ul>

spring-context/src/test/java/org/springframework/tests/mock/jndi/package-info.java

@@ -19,7 +19,7 @@
  *
  * <p>Useful for setting up a simple JNDI environment for test suites
  * or standalone applications. If e.g. JDBC DataSources get bound to the
- * same JNDI names as within a J2EE container, both application code and
+ * same JNDI names as within a Java EE container, both application code and
  * configuration can me reused without changes.
  */
 package org.springframework.tests.mock.jndi;