[WIP][TASK] Streamline Package Management

Change-Id: Ie6ef8e46ad8a58fe173ffd6279606653298e4151
[WIP][TASK] Adoption of absolute paths to sysext paths

Change-Id: Ib7e1d2f6a5703ed9d0c506b077506659801d683c
[WIP][TASK] Replace legacy extension keys with package keys in extPath()

Change-Id: I6543c59c8c031406c2f3f54c74298e15b3b3f860