Avoid running tests for different target frameworks in parallel.

This lets us run more things in parallel which involve shared resources.

build/_k-test.shade

@@ -8,6 +8,7 @@ k-test
 
 projectFile='' 
     Required. Path to the test project.json to execute
+
 */}
 
 @{
@@ -33,21 +34,9 @@ projectFile=''
                 };
         
         // Currently only dnx* targets are supported. See aspnet/Universe#53
-        var targetFrameworks = configs.Keys.Where(k => k.StartsWith("dnx", StringComparison.OrdinalIgnoreCase)).ToList();
+        var targetFrameworks = configs.Keys.Where(k => k.StartsWith("dnx", StringComparison.OrdinalIgnoreCase));
 
-        if (testParallel)
-        {
-            Parallel.ForEach (targetFrameworks, framework => RunTest(projectFolder, framework));
-        }
-        else
-        {
-            targetFrameworks.ForEach(framework => RunTest(projectFolder, framework));
-        }
-    }
-}
-
-functions @{
-    private void RunTest(string projectFolder, string framework)
+        foreach (var framework in targetFrameworks)
         {
             var testArgs = IsMono ? " -parallel none" : "";
 
@@ -61,6 +50,7 @@ functions @{
             }
         }
     }
+}
 
 macro name='K' command='string' workingdir='string' dnvmUse='string'
     k