Bump NServiceBus.Transport.PostgreSql from 8.1.6 to 8.1.7 in /src #5958

Job	Run time
containers	0s
Windows-Default	13m 16s
Windows-SqlServer	8m 16s
Windows-AzureServiceBus	11m 59s
windows-installers	0s
Windows-RabbitMQ	8m 38s
Windows-AzureStorageQueues	6m 58s
Windows-MSMQ	4m 56s
db-container	0s
Windows-SQS	7m 0s
Windows-PrimaryRavenAcceptance	13m 23s
Windows-PrimaryRavenPersistence	6m 12s
Windows-PostgreSQL	5m 27s
Linux-Default	9m 59s
Linux-SqlServer	3m 56s
Linux-AzureServiceBus	9m 29s
Linux-RabbitMQ	3m 42s
Linux-AzureStorageQueues	4m 36s
Linux-SQS	5m 16s
Linux-PrimaryRavenAcceptance	10m 42s
Linux-PrimaryRavenPersistence	4m 42s
Linux-PostgreSQL	3m 3s
container-test	0s
	2h 21m 30s

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