Bug 527813 - remove unneeded jetty includes from org.eclipse.wst.server_adapters.feature feature
Bug 527813 - add missing jetty requires to org.eclipse.wst.server.preview and update to 9.4.7
fix .gitignore for plugins/org.eclipse.jst.server.generic.jonas so generated jar is not accidentally committed to git

Signed-off-by: nickboldt <nboldt@redhat.com>