Bump jetty-servlet from 9.3.25.v20180904 to 9.4.27.v20200227#206

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dependabot/maven/develop/org.eclipse.jetty-jetty-servlet-9.4.27.v20200227CSUC/ECHOES-Tools:dependabot/maven/develop/org.eclipse.jetty-jetty-servlet-9.4.27.v20200227Copy head branch name to clipboard