Add ThreadSafe Impl. to Repositories; fix issue with the parallel execution of the ConnectedAasManager using the MongoDbBackend #207

Job	Run time
AAS Discovery - Build and Start Docker Image	2m 1s
AAS Registry Kafka Mem - Build and Start Docker Image	2m 39s
AAS Environment - Build and Start Docker Image	2m 5s
AAS Registry Kafka MongoDB - Build and Start Docker Image	2m 50s
AAS Registry Log Mem - Build and Start Docker Image	2m 17s
AAS Registry Log MongoDB - Build and Start Docker Image	2m 18s
AAS Repository - Build and Start Docker Image	2m 1s
AASX File Server - Build and Start Docker Image	2m 3s
Concept Description Repository - Build and Start Docker Image	2m 14s
Submodel Registry Kafka Mem - Build and Start Docker Image	2m 27s
Submodel Registry Kafka MongoDB - Build and Start Docker Image	2m 42s
Submodel Registry Log Mem - Build and Start Docker Image	2m 4s
Submodel Registry Log MongoDB - Build and Start Docker Image	2m 49s
Submodel Repository - Build and Start Docker Image	2m 5s
Submodel Service - Build and Start Docker Image	2m 1s
	34m 36s

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