Updating to NH 4.0.1.4000
Avoid failing test for duplicate subscriptions
Merge branch 'release-5.0.0' into release-6.0.0

Conflicts:
	packaging/nuget/nservicebus.nhibernate.nuspec
	src/NServiceBus.NHibernate.AcceptanceTests-Oracle/App_Packages/NSB.AcceptanceTests.5.0.0/PubSub/When_base_event_from_2_publishers.cs
	src/NServiceBus.NHibernate.AcceptanceTests-Oracle/packages.config
	src/NServiceBus.NHibernate.AcceptanceTests/packages.config
	src/NServiceBus.NHibernate.PerformanceTests/packages.config
	src/NServiceBus.NHibernate.Tests/packages.config
	src/NServiceBus.NHibernate/packages.config