BindVars silently drops body keys when not existent in abstractSql resource

[fisehara]

BindVars silently drops body keys that are not existent in abstractSql resource propertyMapping.
This leads to a silent acceptance of a wrong send body.

To be discussed if this should drop / throw an error to report back to the API user that the body is misaligned to the model definition.
Argument for not silently dropping but error respond to the API caller:

• Caller gets aware of unnecessary properties send in the body (reduce bandwith of dropped data)
• Caller get aware of, that the model does NOT support the sent data and can discuss the data model