Added connection consistency checking, ported from OSATE1.5

Steill needs some fine tuning. It used to work with SAVI properties. Now
some of them are in the Data_model annex.
fixed ignoring of conneciton latency value. We calculated it but did not
assign it to a variable.

ALso now use instance paths for names.
An instance path does not include the top-level system instance name.