Client warning on default snapshotcache usage

[bresciamattia]

Is your feature request related to a problem? Please describe.
Using the default snapshot cache (stored in the ES database) is considered a bad practice and will be removed from the API in the future.

Describe the solution you'd like
We want clients to be aware of this deprecation, through a warning whenever the default snapshot cache is used by Factus for a SnapshotProjection or Aggregate.