Issue: SPR-9480

OSIV deferred close mode is not supported with async requests and is
unlikely to be what's the desired. This change adds an exception with
a message stating this.

Issue: SPR-8517

This change updates Open-Session-in-View filters and interceptors for
use in async requests mainly ensuring the open Hibernate session is
unbound from the main request processing thread and bound to the to
async thread.

Issue: SPR-8517

Before this change there were numerous javadoc warnings being reported
while building Spring framework API.

This commit resolves most of the javadoc warnings, reducing the total
number from 265 to 103.

Issue: SPR-9113

Use the preferred SessionFactoryImplementor#getDialect call as
opposed to the previous Dialect#getDialect approach which required
explicitly setting the 'hibernate.dialect' property.

Issue: SPR-7396

This renaming more intuitively expresses the relationship between
subprojects and the JAR artifacts they produce.

Tracking history across these renames is possible, but it requires
use of the --follow flag to `git log`, for example

    $ git log spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history up until the renaming event, where

    $ git log --follow spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history for all changes to the file, before and after the
renaming.

See http://chrisbeams.com/git-diff-across-renamed-directories