Changes for 9.1 p2 builds.
Update name of deployment dir for new jetty-9.1 builds
Make the jetty-9.1 p2 builds go into the same download directory as jetty-9 p2 builds.
428599  javax-websocket-client-impl and javax-websocket-server-impl jars are not in the jetty.bundles.repo
429987  Missing package: org.eclipse.jetty.spdy.http in osgi download
Temporarily commenting out addition of javax.websocket bundles as releases prior to 9.1.4 do not contain correct import/export statements.
Put javax.websocket bundles back in the build in time for 9.1.4.
Add the osgi-ified version of the servlet spec to the p2 repo