Bump jetty-servlet from 9.4.14.v20181114 to 9.4.27.v20200227#270

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dependabot/gradle/org.eclipse.jetty-jetty-servlet-9.4.27.v20200227ngocbd/pokerserver:dependabot/gradle/org.eclipse.jetty-jetty-servlet-9.4.27.v20200227Copy head branch name to clipboard