Use descriptors in tests.

Author: JohanLarsson

IDisposableAnalyzers.Test/IDISP002DisposeMemberTests/CodeFix.Rx.cs

@@ -1,4 +1,4 @@
-namespace IDisposableAnalyzers.Test.IDISP002DisposeMemberTests
+namespace IDisposableAnalyzers.Test.IDISP002DisposeMemberTests
 {
     using Gu.Roslyn.Asserts;
     using Microsoft.CodeAnalysis.CodeFixes;
@@ -11,7 +11,7 @@ public static class Rx
         {
             private static readonly DiagnosticAnalyzer Analyzer = new FieldAndPropertyDeclarationAnalyzer();
             private static readonly CodeFixProvider Fix = new DisposeMemberFix();
-            private static readonly ExpectedDiagnostic ExpectedDiagnostic = ExpectedDiagnostic.Create("IDISP002");
+            private static readonly ExpectedDiagnostic ExpectedDiagnostic = ExpectedDiagnostic.Create(Descriptors.IDISP002DisposeMember);
 
             [Test]
             public static void SerialDisposable()

IDisposableAnalyzers.Test/IDISP002DisposeMemberTests/CodeFix.TestFixture.cs

@@ -1,4 +1,4 @@
-namespace IDisposableAnalyzers.Test.IDISP002DisposeMemberTests
+namespace IDisposableAnalyzers.Test.IDISP002DisposeMemberTests
 {
     using Gu.Roslyn.Asserts;
     using Microsoft.CodeAnalysis.CodeFixes;
@@ -11,7 +11,7 @@ public static class TestFixture
         {
             private static readonly DiagnosticAnalyzer Analyzer = new FieldAndPropertyDeclarationAnalyzer();
             private static readonly CodeFixProvider Fix = new DisposeInTearDownFix();
-            private static readonly ExpectedDiagnostic ExpectedDiagnostic = ExpectedDiagnostic.Create("IDISP002");
+            private static readonly ExpectedDiagnostic ExpectedDiagnostic = ExpectedDiagnostic.Create(Descriptors.IDISP002DisposeMember);
 
             [Test]
             public static void AssigningFieldInSetUp()