Allow synchronous reading communication during simulation

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Symptom
During the processing of an inbound simulation message via Process Agents, all synchronous outbound communication was interdicted with CM_SPAF_CALL_NOT_ALLOWED.
Other terms
PAF, Process Agent Framework
Reason and Prerequisites
The error message was raised as it cannot be assured that the simulation mode can be cascaded consistently so that the changes won’t have any effect on productive data.
The [...]