Re-use servlet-api notice and license for embed-core since it is the same

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1560959 13f79535-47bb-0310-9956-ffa450edef68
Add missing jsp XSDs

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1560961 13f79535-47bb-0310-9956-ffa450edef68