* application.properties support for spring.jms and spring.activemq

* more tests to verify ActiveMQConnectionFactory pooling

* Groovy support and simple sample with activemq

* Groovy detection mechanism is @EnableJmsMessaging annotation

Update SpringBootServletInitializer with separate getConfigClass() and
getAdditionalConfigClasses() methods. This change makes it easier to
use the SpringBootServletInitializer with the common use case of a
single config class.

Update DataSource conditional to ensure that the driver class
can actually be loaded by the DataSource. This fixes an issue when
deploying a classic WAR where `org.apache.tomcat.jdbc.pool.DataSource`
is found the parent classloader but the database driver cannot be loaded
because is included as a local `/lib` dependency.

E.g. in application.properties (for launcher)

foo: Application
loader.main: my.${foo}
loader.path: etc

Adapted to changes in the API in Spring Data Commons which requires to pass in the current Environment into the AnnotationRepositoryConfigurationSource.

Replace all references to 'springsource.org' with the new 'spring.io'
domain.

The `Tomcat.start()` has to happen to initialize the `ServletContext`
but we can immediately stop the connector and then restart it when
the context is finished refreshing. Seems to make curl fail quickly
if an app is slow to start.

Add license and legal information on third party open source software that is part of the CLI distribution

Correct the TravisCI link used for the build status image following the
GitHub organization rename from SpringSource to spring-projects.

* Add ability to detect spring-jms on the path and create a JmsTemplate with
  ActiveMQConnectionFactory
* Create tests showing autoconfigured JmsTemplate with ActiveMQ, but prove it
  backs off if a separate ConnectionFactory exists.
* Add support to spring-boot-cli to that it detects JmsTemplate, DefaultMessageListenerContainer,
  or SimpleMessageListenerContainer, and turns on autoconfiguration as well as
  add proper @Grab's and import statements.
* Write a jms.groovy test showing proper CLI support

Simplify ActiveMQ configuration

Update ActiveMQ to 5.7.0

username/password pairs were incorrect. The authentication manager has "user" and "password", so those credentials should be allowed to get the actual message.

* @EnableTransactionManagement triggers spring-tx imports
* Field or method of type JdbcTemplate or NamedParameterJdbcTemplate
  of DataSource triggers spring-jdbc imports

When user deploys app as a WAR in Tomcat, unless the tomcat-jdbc.jar
is in the app package, it will be found in the parent first and then
be unable to load the Driver class.

[Fixes #56720610] [bs-316] Tomcat non-embedded cannot load SQL driver class

[Fixes #56812760] [bs-319] Spring bootstrap in log message

Fix AuthenticationManagerBuilder code snippet to add the missing the
ObjectPostProcessor parameter for the constructor.

Issue: #45

Spring Data Mongo is the only dependency so it doesn't
really need a new starter. Added a sample though.

A side effect is that spring-boot-starter-data-jpa needs
to include an aspectjweaver depdendency. Hope that doesn't
hurt anything else.

[Fixes #56780004]