At the moment logic for applying predefined enchanced pipelines
is reversed.
So in case a user has supplied a well-defined content, instead of
respecting it we apply heavy opinionated adjustements to it,
while in case of plain ceilometer config we skip defining them.
From my prespective _ceilometer_pipeline_yaml_overrides
which contain essential for gnocchi transformations should be applied
only in cases where no user content is provided.
Change-Id: I862e4857beeaad52a59284c2025d2c9d478617a1
9a8976d4ca