Fix Audit with mongodb

****** chain ******
Name: NBM.AuditProvider
Exception: OperationException
Caught error: Failed to invoke operation NBM.AuditProvider
Caused by: org.nuxeo.ecm.automation.OperationException: Failed to invoke operation NBM.AuditProvider
****** Hierarchy calls ******
	com.nuxeo.brand.management.operations.AuditProvider

		at org.nuxeo.ecm.automation.core.trace.TracerFactory.onTrace(TracerFactory.java:198)
		at org.nuxeo.ecm.automation.core.trace.Tracer.popContext(Tracer.java:73)
		at org.nuxeo.ecm.automation.core.trace.Tracer.onChainExit(Tracer.java:86)
		at org.nuxeo.ecm.automation.core.impl.OperationChainCompiler$CompiledChainImpl.lambda$invoke$0(OperationChainCompiler.java:227)
		... 143 more
Caused by: org.bson.json.JsonParseException: JSON reader was expecting a value but found 'from'.
	at org.bson.json.JsonReader.readBsonType(JsonReader.java:237)
	at org.bson.AbstractBsonReader.verifyBSONType(AbstractBsonReader.java:682)
	at org.bson.AbstractBsonReader.checkPreconditions(AbstractBsonReader.java:724)
	at org.bson.AbstractBsonReader.readStartDocument(AbstractBsonReader.java:452)