This commit replaces Spring Boot's basic dependency management support
with separate dependency management plugin. This has a number of
benefits including:
1. A Maven bom can be used rather than a custom properties file
2. Dependency management is applied transitively rather than only to
direct dependencies
3. Exclusions are applied as they would be in Maven
4. Gradle-generated poms are automatically configured with the
appropriate dependency management
Closes gh-2133
Mixing Hibernate and a JTA provider may lead to duplicate JTA
dependencies as the API is published with different coordinates.
The following has been applied:
* We now use `javax.transaction:javax.transaction-api` everywhere.
* The `data-jpa` starter has been updated to replace the JBoss JTA
dependency with the standard one.
* The `jta-bitronix` starter has been updated to use JTA 1.2 instead of
JTA 1.1 (unfortunately, JTA 1.1 is published with different
coordinates).
* The `jta-atomikos` starter has been updated to define a dependency on
JTA as the current version does not do it at all.
* The HornetQ JMS server is also relying on JTA but that dependency
should have been optional. It has been excluded for the time being as
it was using (yet) another set of coordinates.
Fixes gh-2092
Andy Wilkinson
Phillip Webb
Spring Buildmaster
Stephane Nicoll
Josh Long