Bump JBTIS TP to 4.1.5.Final
release 4.2.0.Alpha1 to http://download.jboss.org/jbosstools/updates/development/luna/; add new discovery plugin plugins/org.jboss.tools.central.discovery_4.2.0.Alpha1-v20131211-0206-B19.jar + update jbosstools-directory.xml
fix links in discovery plugin and add new updates/development/luna/central/core/ site
Dependencies from Luna M4
version updates for new teiid designer