Simplify access to SA1307's descriptor

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/NamingRules/SA1304NonPrivateReadonlyFieldsMustBeginWithUpperCaseLetter.cs

@@ -45,9 +45,6 @@ internal class SA1304NonPrivateReadonlyFieldsMustBeginWithUpperCaseLetter : Diag
 
         private static readonly Action<SyntaxNodeAnalysisContext> FieldDeclarationAction = HandleFieldDeclaration;
 
-        private static readonly DiagnosticDescriptor SA1307Descriptor =
-            new SA1307AccessibleFieldsMustBeginWithUpperCaseLetter().SupportedDiagnostics.Single();
-
         /// <inheritdoc/>
         public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; } =
             ImmutableArray.Create(Descriptor);
@@ -87,7 +84,7 @@ private static void HandleFieldDeclaration(SyntaxNodeAnalysisContext context)
             {
                 // SA1307 is taken precedence here. SA1307 should be reported if the field is accessible.
                 // So if SA1307 is enabled this diagnostic will only be reported for internal fields.
-                if (!context.IsAnalyzerSuppressed(SA1307Descriptor))
+                if (!context.IsAnalyzerSuppressed(SA1307AccessibleFieldsMustBeginWithUpperCaseLetter.Descriptor))
                 {
                     return;
                 }

StyleCop.Analyzers/StyleCop.Analyzers/NamingRules/SA1307AccessibleFieldsMustBeginWithUpperCaseLetter.cs

@@ -37,8 +37,10 @@ internal class SA1307AccessibleFieldsMustBeginWithUpperCaseLetter : DiagnosticAn
         private const string Description = "The name of a public or internal field in C# does not begin with an upper-case letter.";
         private const string HelpLink = "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1307.md";
 
-        private static readonly DiagnosticDescriptor Descriptor =
+#pragma warning disable SA1202 // Elements should be ordered by access
+        internal static readonly DiagnosticDescriptor Descriptor =
             new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, AnalyzerCategory.NamingRules, DiagnosticSeverity.Warning, AnalyzerConstants.EnabledByDefault, Description, HelpLink);
+#pragma warning restore SA1202 // Elements should be ordered by access
 
         private static readonly Action<SyntaxNodeAnalysisContext> FieldDeclarationAction = HandleFieldDeclaration;