BZ1038565 Change BOM to comply with jboss-developer requirements and
conventions

Change the groupid to org.jboss.bom.portal and artifactid to
jboss-portal-bom
Make the version follow the version number of JBoss Portal rather than
GateIn
Use -build-x version suffix for development.
GTNPORTAL-3255 Quickstarts: Modify GAV to use org.jboss.quickstarts.jpp