Changes

[maven-release-plugin] prepare release 2.5

[maven-release-plugin] prepare for next development iteration

Configure javac to use --release when building on JDK 9+ (#58)

We use the maven-compiler-plugin's `maven.compiler.release` property
to configure the --release value when building on JDK 9 or
later. Using --release is preferable to using --source/--target as
--release also factors in the class libraries available in the
release.

Unfortunately, setting this property when building on JDK 8 causes a
build error as the maven-compiler-plugin passes the --release option
to javac which does not understand it. So we use a maven profile to
set the property only when JDK is 9 or higher.

Signed-off-by: BJ Hargrave <hargrave@us.ibm.com>

Test dependencies only for the TCK module (#59)