java/postgres-jdbc does not install with Java 8

[easye]

Notes towards finishing the attached patch:

Port fails to install with Java 8. Setting version to '9.3-1102' downloads a more current version of postgresql-jdbc.

Bumping Portfile to download a version '9.3-1102' runs into problems finding the (not installed) maven-ant-tasks jar. Added dependency to portfile.

maven-ant-tasks depends on maven2, but seems to installs the correct jar.

The Ant build file for postgresql-jdbc looks for the maven-ant-tasks in <file:/opt/local/share/apache-ant/lib/>, but it is installed in <file:/opt/local/share/java/>. One has to use the '-lib' option to the Ant invocation to specify the library.

Next problem lies in the build's Ant process trying to download dependencies via Maven but unable to save these downloads to <file:/opt/local/var/macports/home/.m2/repository/>.

[easye]

Incomplete initial patch of Portfile towards resolution