Update AggregateRootMappedByConventionTests.cs

Maybe I'm wrong, but the names of the event handlers suggested that their visibility was set wrong.
Update AggregateRootMappedByExpressionTests.cs

Again, naming of event handlers suggested incorrect visibility.
Merge pull request #102 from adamcogx/patch-1

Update AggregateRootMappedByConventionTests.cs
Merge pull request #103 from adamcogx/patch-2

Update AggregateRootMappedByExpressionTests.cs
Merge branch 'master' of https://github.com/ncqrs/ncqrs