- fixed test ThrowsOnGetDeletedAggregate so it passes

Hi,

I made a small update to streamName in test ThrowsOnGetDeletedAggregate in GetEventStoreRepository.Tests/GetEventStoreRepositoryIntegrationTests.cs to match the default by_category internal projection in EventStore v1.0.1. The test was failing because streamName was using a string form of the Guid ID that had hyphens in it, whereas the default by_category projection seems to strip them out.

Regards,
Robert