Add a RavenDB dirty memory custom check #6459

Job	Run time
Windows-Default	12m 13s
Windows-SqlServer	8m 29s
Windows-AzureServiceBus	11m 14s
Windows-RabbitMQ	6m 32s
Windows-AzureStorageQueues	6m 9s
Windows-MSMQ	4m 7s
Windows-SQS	29s
Windows-PrimaryRavenAcceptance	12m 20s
Windows-PrimaryRavenPersistence	6m 37s
Windows-PostgreSQL	4m 50s
Linux-Default	1m 41s
Linux-SqlServer	2m 0s
Linux-AzureServiceBus	1m 48s
Linux-RabbitMQ	1m 43s
Linux-AzureStorageQueues	1m 40s
Linux-SQS	1m 47s
Linux-PrimaryRavenAcceptance	1m 51s
Linux-PrimaryRavenPersistence	1m 49s
Linux-PostgreSQL	1m 54s
containers / servicecontrol	1m 52s
containers / servicecontrol-audit	1m 54s
db-container / db-container	1m 2s
containers / servicecontrol-monitoring	2m 4s
windows-installers / build	5m 50s
container-test	0s
	1h 41m 55s

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