[maven-release-plugin] prepare release maven-3.2.4
[maven-release-plugin] prepare for next development iteration
[MNG-5686] mvn cannot execute /usr/libexec/java_home/bin/java on OS X.

Patch supplied by Jonathan Sailor, applied unmodified
MNG-5719 reintroduced DefaultJavaToolChain

DefaultJavaToolChain was the only way to access JDK toolchain
javaHome parameter and was used by some clients, notably Tycho.
The class is now marked as deprecated and clients are adviced to
use JavaToolchainImpl instead.

Signed-off-by: Igor Fedorenko <ifedorenko@apache.org>
added a notice about internal API
since this class is new, immediately mark it package protected: it is
the implementation of JavaToolchain interface (even if the interface is
empty at the moment)
updated unit test
added classic deploySite.sh script to ease site generation and deployment to http://maven.apache.org/ref/3-LATEST/
[maven-release-plugin] prepare release maven-3.2.5
[maven-release-plugin] prepare for next development iteration