Swap Import-Package and Require-Bundle

git-svn-id: https://svn.apache.org/repos/asf/directory/studio/branches/studio-tycho@1647123 13f79535-47bb-0310-9956-ffa450edef68
Remove Bundle-Activator

git-svn-id: https://svn.apache.org/repos/asf/directory/studio/branches/studio-tycho@1647124 13f79535-47bb-0310-9956-ffa450edef68