Add ThreadSafe Impl. to Repositories; fix issue with the parallel execution of the ConnectedAasManager using the MongoDbBackend #204

Job	Run time
AAS Registry Kafka Mem - Build and Start Docker Image	52s
AAS Environment - Build and Start Docker Image	40s
AAS Discovery - Build and Start Docker Image	34s
AAS Registry Kafka MongoDB - Build and Start Docker Image	35s
AAS Registry Log Mem - Build and Start Docker Image	33s
AAS Registry Log MongoDB - Build and Start Docker Image	41s
AAS Repository - Build and Start Docker Image	32s
AASX File Server - Build and Start Docker Image	42s
Concept Description Repository - Build and Start Docker Image	33s
Submodel Registry Kafka Mem - Build and Start Docker Image	43s
Submodel Registry Kafka MongoDB - Build and Start Docker Image	37s
Submodel Registry Log Mem - Build and Start Docker Image	42s
Submodel Registry Log MongoDB - Build and Start Docker Image	34s
Submodel Repository - Build and Start Docker Image	33s
Submodel Service - Build and Start Docker Image	32s
	9m 23s

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