Hibernate exception translation covers NonUniqueObjectException to DuplicateKeyException case (SPR-8996)

Cannot yet actually reproduce the issue, but this remains a useful
test case.

Issue: SPR-8934

Prior to this change, the spring-cache XSD allowed a 'key-generator'
attribute, but it was not actually parsed by AnnotationDrivenCacheBDP.

This commit adds the parsing logic as originally intended and the test
to prove it.

Issue: SPR-8939

Prior to this change, the caching reference docs referred to
'root.params', whereas the actual naming should be 'root.args'. This
naming was also reflected in the "#p" syntax for specifying method args.

This change updates the documentation to refer to 'root.args' properly
and also adds "#a" syntax for specifying method arguments more
intuitively. Note that "#p" syntax remains in place as an alias for
backward compatibility.

Issue: SPR-8938

Complete pass with `dos2unix` found additional files missed on earlier
related commit.

Issue: SPR-5608

added protected "isPersistenceUnitOverrideAllowed()" method to DefaultPersistenceUnitManager (SPR-8925)

Hibernate synchronization properly unbinds Session even in case of afterCompletion exception (SPR-8757)

officially deprecated TopLinkJpaDialect in favor of EclipseLink and Spring's EclipseLinkJpaDialect; updated supported version ranges for EclipseLink and OpenJPA

Hibernate 4 LocalSessionFactoryBean implements PersistenceExceptionTranslator interface as well (SPR-8952); consistent extending of HibernateExceptionTranslator for Hibernate 3 as well as Hibernate 4

Prior to this change, roughly 5% (~300 out of 6000+) of files under the
source tree had CRLF line endings as opposed to the majority which have
LF endings.

This change normalizes these files to LF for consistency going forward.

Command used:

$ git ls-files | xargs file | grep CRLF | cut -d":" -f1 | xargs dos2unix

Issue: SPR-5608

spring-build was previously included via an svn:external. Adding
directly to the source tree under Git to avoid the need for a git
submodule.

In order to build from any earlier commit, it is recommended to
export spring-build or symlink an existing copy into the root
of the spring-framework project and then build normally.

    $ svn export https://src.springsource.org/svn/spring-build/tags/project-build-2.5.2 spring-build