Explicit import javax packages, not all OSGi runtimes (Felix) import them by default

git-svn-id: https://svn.apache.org/repos/asf/directory/shared/trunk@1645978 13f79535-47bb-0310-9956-ffa450edef68
Explicit import javax packages, not all OSGi runtimes (Felix) import them by default

git-svn-id: https://svn.apache.org/repos/asf/directory/shared/trunk@1645991 13f79535-47bb-0310-9956-ffa450edef68