Fix missing spring-instrument jar manifest entry

The spring-intstrument jar should have a 'Premain-Class:' manifest
entry in order to enable use as a Java agent. This entry was present in
versions 3.1.1 and earlier, but due to build infrastructure changes
starting in 3.2.x this entry was missed. It is now back in place as
expected.

Issue: SPR-9458
Update dependencies for spring-aspects

 - Explicitly specify compile-time dependencies on other spring-*
   modules, primarily for accuracy in pom generation and ensuring
   minimal dependencies for users of spring-aspects.

 - Remove use of p: namespace from annotation-cache-aspectj.xml to
   avoid parser-related test failures under Eclipse (likely due to
   classpath differences between Gradle and Eclipse).
Polish web.client exceptions and related classes

The following style updates have been made in anticipation of
substantive changes in subsequent commits:

 - organize imports
 - correct whitespace errors (leading spaces in code, tabs in Javadoc)
 - wrap Javadoc at 90 chars; make imperative ("Return" vs. "Returns")
 - use conventional constructor argument wrapping

A serialVersionUID has also been added to RestClientException and its
ResourceAccessException subclass for consistency with the rest of that
same exception hierarchy.

Issue: SPR-7938
Include response headers in RestTemplate exceptions

Default HTTP error exceptions thrown from RestTemplate now include
response headers in addition to the response body. In particular, this
enables inspection of the Content-Type header allowing manual
deserialization of the response body without guessing as to the content
type.

 - introduce HttpStatusCodeException#getResponseHeaders
 - add constructor with headers param for HttpStatusCodeException,
   HttpClientErrorException and HttpServerErrorException
 - preserve exsisting constructor signatures
 - mark HttpHeaders as Serializable
 - generate new serialVersionUID where needed

Issue: SPR-7938
Merge pull request #86 from scothis/SPR-7938

* SPR-7938:
  Include response headers in RestTemplate exceptions
  Polish web.client exceptions and related classes
Use transactional connection during db population

Previously, DatabasePopulatorUtils#execute looked up a Connection from
the given DataSource directly which resulted in the executed statements
not being executed against a transactional connection (if any) which in
turn resulted in the statements executed by the populator potentially
not being rolled back.

Now DataSourceUtils#getConnection is used to transparently take part in
any active transaction and #releaseConnection is used to ensure the
connection is closed if appropriate.

Issue: SPR-9457
Merge pull request #87 from olivergierke/SPR-9457

* SPR-9457:
  Use transactional connection during db population
Reproduce claims raised in SPR-8849

This commit introduces a test suite (Spr8849Tests) that demonstrates
the claims made in SPR-8849.

Specifically, if <jdbc:embedded-database id="xyz" /> is used to create
an embedded HSQL database in an XML configuration file and that
configuration file is imported in different sets of configuration files
that are used to load ApplicationContexts for different integration
tests, the embedded database will be initialized multiple times using
any nested <jdbc:script /> elements. If such a script is used to create
a table, for example, subsequent attempts to initialize the database
named "xyz" will fail since an embedded database named "xyz" already
exists in the JVM.

As a work-around, this test suite uses a SpEL expression to generate a
random string for each embedded database instance:

  id="#{T(java.util.UUID).randomUUID().toString()}"

See the Javadoc in Spr8849Tests for further information.

Issue: SPR-8849
spring-test module now depends on junit:junit-dep

The junit:junit Maven artifact includes a bundled version of hamcrest
core. For projects that depend on later versions of hamcrest this causes
significant issues in terms of dependency management.

The spring-test module now depends on junit:junit-dep, thus allowing
developers to better manage their test dependencies on a more fine
grained level.

Also tidied up dependency issues regarding hamcrest-core and
hamcrest-all across the build.

Issue: SPR-6966
Upgrade to Gradle 1.0 GA

Issue: SPR-9494
Require aopalliance dependency for spring-aop

A recent commit made aopalliance optional for spring-aop, while
continuing to require it for spring-tx. On review, this is probably
overly aggressive, and for convenience aopalliance should remain
required for spring-aop. There are use cases for which aopalliance is
indeed optional, but core functionality such as <aop:scoped-proxy>
should never result in a ClassNotFoundException.

This commit returns the aopalliance dependency for spring-aop to
required status, and also explicitly notes the same dependency in other
modules that compile directly against aopalliance types.

Issue: SPR-9501
Raise RestClientException for unknown status codes

HttpStatus cannot be created with an unknown status code. If a server
returns a status code that's not in the HttpStatus enum values, an
IllegalArgumentException is raised. Rather than allowing it to
propagate as such, this change ensures the actual exception raised is
a RestClientException.

Issue: SPR-9406
Add Maven artifacts to .gitignore
SPR-9498: don't make assumptions about equality if ConversionService has failed

The failure of the conversion service is not fatal, but the check that
was in there (line 248) was inadequate to detect the cases that could
already be handled by the default property editors.  This code path
was also not tested anywhere in spring-beans tests until now.
SPR-9498: Add support for MultiValueMap to CollectionFactory

This turns out not to be the main problem exposed in SPR-9498
but it seems like a sensible addition anyway.
Allow parsing of media types with single-quotes

Previously MediaType could only parse double-quoted parameters without
raising an IllegalArgumentException. Now parameters can also be
single-quoted.

Issue: SPR-8917
Merge pull request #93 from maxcom/SPR-8917

* SPR-8917:
  Allow parsing of media types with single-quotes
Add splitIndex Javadoc option to the root project

Splits the very large index page with all classes into individual pages
organized by first letter.

Issue: SPR-4984
Merge pull request #95 from rstoyanchev/SPR-4984

* rstoyanchev/SPR-4984:
  Add splitIndex Javadoc option to the root project
Minor Javadoc fix

Issue: SPR-9513