Bump jetty-server from 9.4.9.v20180320 to 9.4.17.v20190418 in /TwitterFeeder#2

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dependabot/maven/TwitterFeeder/org.eclipse.jetty-jetty-server-9.4.17.v20190418Idosegal/TwitterFeeder-Java:dependabot/maven/TwitterFeeder/org.eclipse.jetty-jetty-server-9.4.17.v20190418Copy head branch name to clipboard