Because of separation of openide into pieces the TopManger.getExecEng() should
be deprecated and replaced by ExecutionEngine.getDefault() that will use the
Lookup to initialize the engine. Also core should be modified to register its
engine in acceptable way - this reflects the separation of core to platform
Subtask of issue 19443 which requires API change.
Done. Openide 2.16.
Resolved for 3.4.x or earlier, no new info since then -> closing.