JBIDE-13618 remove struts from JBT 4.1
point JBTIS 4.0.x update sites' associate.properties at http://download.jboss.org/jbosstools/updates/juno/ (latest TP) rather than specific version (deprecated SR1a)
JBIDE-13749: 4.1 in label (instead of 4.0)
fix site descriptions and AbridgedTools label (JBIDE-13749)