Revert "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"

This reverts commit 3102f5f1096468d12581f1cb603138299461f2c7.

Change-Id: I1cd3d2327f6f44a8b46789b82b26928b81b2922f