The plan is to:
1. bring latest changes from JDK repository: http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/tip/test/sanity/client/lib/jemmy/src
2. make sure JDK repository contains the same version.
3. update http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/3f515b6a5c99/test/sanity/client/lib/jemmy/README file to tell that the version in JDK is a read-only copy of http://hg.openjdk.java.net/code-tools/jemmy/v2/