Re-add sigtest and zip; Run TCK in build

- Delete some eclipse config files.
- Delete no longer used build.xml from tck module.
- Add sigtest generation to tck modules pom.
- Add batch.xml generation to tck modules pom.
- Update module com.ibm.jbatch.tck to build a jar that contains all the
  files nessessary to execute the TCK using the maven-dependency-plugin
  unpack goal, a common way of executing test's in third party jars.
- Add module com.ibm.jbatch.tck.dist to build the downloadable zip.
- Add module com.ibm.jbatch.tck.exec to execute the tck with the RI.