Merge changes Ia95da478,I2773aa94,Ib745645f,I92c65f34,Ibb714002, ...

Merge changes Ia95da478,I2773aa94,Ib745645f,I92c65f34,Ibb714002, ...

* changes:
  Remove BitmapRevFilter.getCountOfLoadedCommits
  Make BitmapBuilder.getBitmapIndex public
  Deprecate BitmapBuilder.add and introduce simpler addObject method
  Add @Override annotations to BitmapIndexImpl
  Rely on bitmap RevFilter to filter walk during bitmap selection
  Use 'reused' bitmap to filter walk during bitmap selection
  Rely on bitmap RevFilter to filter tip commit setup walk
  Use 'reused' bitmap to filter tip commit setup walk
  Include ancestors of reused bitmap commits in reuse bitmap again