clean up maven-plugin-plugin definition, already inherited from parent
updated site banners and skin
fixed IT broken when using plugin-tools 3.x instead of 2.9, with
property meaning changed by MPLUGIN-199
manage verifier version

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
MNG-5581 lifecycle mapping delegate test

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>