app-admin/collectd: Use the Java eclasses wrt but #558310

app-admin/collectd: Use the Java eclasses wrt but #558310

Java team needs to remove java-config-wrapper, which this erroneously
depends on. The existing ebuild does not make use of the Java
eclasses, which can lead to problems. I have:

 * Made use of java-pkg-opt-2.
 * Added a DEPEND on virtual/jdk.
 * Used sed against the Java Makefile.am to set proper javac flags.
 * Used the eclasses to properly set JAVA_HOME.
 * Registered the installed jars so that Gentoo metadata is created.

Package-Manager: portage-2.2.20.1