Separate helpers for testing an actual contract descriptor from helpers for mock memory
Tests/helpers for the contract descriptor are now under the ContractDescriptor folder
Make all contracts tests use the mock target instead of creating a contract descriptor and using the ContractDescriptorTarget
Update root namespaces from Microsoft.Diagnostics.DataContractReader.UnitTests -> Microsoft.Diagnostics.DataContractReader.Tests to match assembly name
ContractDescriptor
folderContractDescriptorTarget
Microsoft.Diagnostics.DataContractReader.UnitTests
->Microsoft.Diagnostics.DataContractReader.Tests
to match assembly name