Fixed issue when branch config matches regex and fails validation

Author: JakeGinnivan

src/GitVersionCore.Tests/ConfigProviderTests.cs

@@ -36,6 +36,8 @@ public void CanReadOldDocument()
 develop-branch-tag: alpha
 release-branch-tag: rc
 branches:
+    master:
+        mode: ContinuousDeployment
     dev(elop)?(ment)?$:
         mode: ContinuousDeployment
         tag: dev

src/GitVersionCore/Configuration/LegacyConfigNotifier.cs

@@ -32,7 +32,7 @@ public static void Notify(StringReader reader)
 
             var issues = new List<string>();
 
-            var oldConfigs = legacyConfig.Branches.Keys.Where(k => OldConfigKnownRegexes.Keys.Contains(k)).ToList();
+            var oldConfigs = legacyConfig.Branches.Keys.Where(k => OldConfigKnownRegexes.Keys.Contains(k) && k != OldConfigKnownRegexes[k]).ToList();
             if (oldConfigs.Any())
             {
                 var max = oldConfigs.Max(c => c.Length);