Adding ant dependency for jdkpackager builds. Follow up to #719

[muuki88]

Changing jdeb to a provided dependency removed the ant dependency from the runtime classpath, which is needed for the jdkpackager plugin.

Adding travis tests and dependency.

[muuki88]

@metasim you have any idea why this test breaks on travis ?

test-package-image/target/jdkpackager/build.xml:25: fx:info doesn't support the nested "association" element.

On my machine (Ubuntu 15.10, java version "1.8.0_66") things work.

[metasim]

@muuki88 I need to check the logs more, but my guess is that the travis config had JDK version less than 1.8.0_40, which is when the file association capability was added. Any idea if travis allows for finer grained Java version specifications?

[metasim]

Indeed, the failed build uses an older version of Java 1.8.0 (why the hell Oracle couldn't bump the minor revision number instead of this build number crap is beyond me).

java version "1.8.0_31"

[muuki88]

I'm afraid travis has no other way to specify the minor/patch versions in oracle-jdk. For now I ignore this test and add it when travis has upgraded their java version.

Thanks for looking into :)

[muuki88]

There is an issue (over a year old) which states that travis will upgrade soon (note in november) #3259