Latest dependency updates (HttpClient 4.4, TestNG 6.8.21, SnakeYAML 1.15, FreeMarker 2.3.22, JRuby 1.7.19, JAMon 2.81, JiBX 1.2.6, XMLUnit 1.6, JsonPath 1.2)

Revert cdc04e55 now that animal sniffer 1.1.4 is available.

This commit simplifies the implementations of loadBeanDefinitions() in
GenericGroovyXmlContextLoader and GenericGroovyXmlWebContextLoader.

Due to the recent bug fix for GroovyBeanDefinitionReader regarding full
support for XML config files, these Groovy context loaders can now
simply use a GroovyBeanDefinitionReader instead of a
GroovyBeanDefinitionReader plus an XmlBeanDefinitionReader.

Issue: SPR-12769

Prior to this commit, the GroovyBeanDefinitionReader claimed (via its
Javadoc) that it fully supported XML configuration files in addition to
its Groovy DSL; however, this was unfortunately inaccurate since XML
validation was disabled by default which led to certain features of XML
configuration not working. For example, it was impossible to define a
<qualifier> in an XML config file without specifying the 'type'
attribute (which has a default value defined in the spring-beans XSD).

This commit fixes this issue by ensuring that bean definitions in XML
resources are loaded with a "standard" XmlBeanDefinitionReader that is
created with default settings (i.e., with XML validation enabled). With
regard to backwards compatibility, bean definitions defined using the
Groovy DSL are still loaded with an XmlBeanDefinitionReader that has
XML validation disabled by default which is necessary for proper
parsing of the Groovy DSL.

Issue: SPR-12769

Prior to this commit, it was impossible to use all features of XML
configuration (e.g., the <qualifier> tag) in web-based integration
tests (loaded using @WebAppConfiguration, @ContextConfiguration, etc.)
if the Groovy library was on the classpath. The reason is that the
GroovyBeanDefinitionReader used internally by
GenericGroovyXmlWebContextLoader disables XML validation for its
internal XmlBeanDefinitionReader, and this prevents some XML
configuration features from working properly. For example, the default
value for the 'type' attribute (defined in the spring-beans XSD) of the
<qualifier> tag gets ignored, resulting in an exception when the
application context is loaded.

This commit addresses this issue by refactoring the implementation of
loadBeanDefinitions() in GenericGroovyXmlWebContextLoader to use an
XmlBeanDefinitionReader or GroovyBeanDefinitionReader depending on the
file extension of the resource location from which bean definitions
should be loaded. This aligns the functionality of
GenericGroovyXmlWebContextLoader with the existing functionality of
GenericGroovyXmlContextLoader.

Issue: SPR-12768

Prior to this commit, the implementation of equals() in EncodedResource
was based solely on the resource and encoding. Thus, if a Charset were
specified instead of an encoding, invocations of equals() would not
work as expected.

This commit addresses this issue by including the charset in the
implementation of equals() and introducing corresponding tests in a new
EncodedResourceTests class. Furthermore, this commit makes
EncodedResource immutable and updates all Javadoc to reflect support
for the encoding and charset properties.

Issue: SPR-12767

Issue: SPR-12766

Issue: SPR-12752

Issue: SPR-12752

Issue: SPR-12705

Protected handleResponse method replaces former private logResponseStatus/handleResponseError methods.

Issue: SPR-12760

- classes now compiled with `-parameters`
- formatting for lambda expressions
- formatting for type annotations

To eliminate code duplication, ScriptStatementFailedException and
ScriptUtils now delegate to a new buildErrorMessage() utility method.

Issue: SPR-12752

This commit ensures Resources have consistent, non-empty, meaningful
implementations for getDescription(), thus ensuring that calls to
toString() (e.g., in log statements) no longer return an empty String.

This commit also polishes the Javadoc for various Resource
implementations.

ScriptStatementFailedException now properly refers to statement numbers
instead of line numbers.

Issue: SPR-12752

Added connectTimeout and readTimeout properties to the
Netty4ClientHttpRequestFactory.

Issue: SPR-12612

Issue: SPR-12735

Issue: SPR-12739

Issue: SPR-12755

Issue: SPR-12758

Issue: SPR-12748

Issue: SPR-12747

Prior to this change, location checks for serving resources would append
`/` to the location path it didn't already have one.

This commit makes sure not to append a `/` if the provided location is
actually a file.

Issue: SPR-12747

* pull745:
  Provide accessors to scheduled tasks

Updated ScheduledTaskRegistrar to offer accessors to the tasks
it is responsible to schedule.

Issue: SPR-12748

Reduce logging level when no target annotation is found a on bean. For
consistency, update ScheduledAnnotationBeanPostProcessor and
JmsListenerAnnotationBeanPostProcessor that define the same log
statement.

Issue: SPR-12574

Issue: SPR-12751

Issue: SPR-12744