Revert change to DiagnosticAnalyzerTestBase.GetSortedDiagnostics
Revert change to DiagnosticAnalyzerTestBase.GetSortedDiagnostics

I'd made a change to make the order more predictable, but it broke an existing test. I could have changed the order of "expected diagnostics" specified by that test, but I'm not particularly fond of the change to the test class, so I reverted it.

qinxgit/roslyn-analyzers,mavasani/roslyn-analyzers,genlu/roslyn-analyzers,dotnet/roslyn-analyzers,heejaechang/roslyn-analyzers,natidea/roslyn-analyzers,Anniepoh/roslyn-analyzers,mavasani/roslyn-analyzers,jasonmalinowski/roslyn-analyzers,pakdev/roslyn-analyzers,bkoelman/roslyn-analyzers,srivatsn/roslyn-analyzers,dotnet/roslyn-analyzers,pakdev/roslyn-analyzers