JBIDE-14637 : synchronize ProxyWizardManager listeners

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13987 : properly load proxy wizards from remote sources

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13987 : fix test manifest & copyright

Signed-off-by: Fred Bricon <fbricon@gmail.com>