Improve coverage for SA1404 by adding test for other attributes besides suppressions

Author: bjornhellander

StyleCop.Analyzers/StyleCop.Analyzers.Test/MaintainabilityRules/SA1404UnitTests.cs

@@ -410,5 +410,19 @@ public void Bar()
             };
             await VerifyCSharpDiagnosticAsync(testCode, expected, CancellationToken.None).ConfigureAwait(false);
         }
+
+        [Fact]
+        public async Task TestOtherAttributeAsync()
+        {
+            var testCode = @"public class Foo
+{
+    [System.Obsolete(""Method is obsolete!"")]
+    public void Bar()
+    {
+    }
+}";
+
+            await VerifyCSharpDiagnosticAsync(testCode, DiagnosticResult.EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
+        }
     }
 }