Adds vdb sequencer library to modeshape lib plugin

* In order to use the library in an OSGI environment, it is necessary to
  unpack the jar into a directory and add that to the modeshape lib
  classpath

* Version 4.1 of modeshape has a fix for this so after release, this can
  be changed back to use the jar archive as is.
Refactor Modeshape repository parent classes

* Moves Modeshape engine / repository test classes to its own utils plugin
  so that they can be shared between test plugins

* Provides framework for getting plugin specific repository configurations
  from a /data directory.
Merge pull request #36 from phantomjinx/vdb-sequencer

Vdb sequencer
Allows komodo cnds to be loaded by Modeshape

* NodeTypesImporter in modeshape.lib uses the latter's classloader for
  loading resources. This classloader has no knowledge of komodo.core
  hence fails to find the cnd files.

* By registering core with modeshape.lib, the former has access to core's
  classpath and loads resources successfully.
Reduces logging of all modeshape tests

* Single abstract class for configuring modeshape logging to manageable
  amount.

* All test classes should extend AbstractLoggingTest in order to reduce
  logging.
Merge pull request #37 from phantomjinx/master

Komodo cnds and reduction in logging