scheduler: adding debug traces in task start sequence
fixing probable bug and memory leak: Event class w/o virtual destructor
fixing minor compilation warnings
scheduler: removing debug traces in task start sequence

This reverts commit d6e1024ffdd49b0a1175e0c086f7a7d16db5fe87.
Merge branch 'maint'

* b14:
  scheduler: removing debug traces in task start sequence
  fixing minor compilation warnings
  fixing probable bug and memory leak: Event class w/o virtual destructor
  scheduler: adding debug traces in task start sequence