jbosstools-hibernate has a bunch of new plugins in the master branch (such as org.jboss.tools.hibernate.runtime.spi), but these do not appear inside the hibernate tools feature, so they don't exist in the hibernate tools update site, and therefore can't be aggregated into the JBT update site or into JBDS.

[ERROR]   Missing requirement: org.hibernate.eclipse 5.0.0.Alpha1-v20150123-1723-B764 requires 'bundle org.jboss.tools.hibernate.runtime.spi 5.0.0' but it could not be found