Ensures all resolvers are sealed. Changes CacheRefreshersResolver, DataTypesResolver, MacroFieldEditorsResolver, PackageActionsResolver, ActionsResolver

to all be lazy resolvers as they are not needed instantly on app startup (not needed by the front-end) This will
make app startup a lot quicker. Fixes ActionsResolver to not use the PluginManager to resolve the types when it
is instantiating them since these are passed in the ctor. Updates all unit tests to use lazy delegate for these resolvers
and they are all passing.

src/Umbraco.Core/ObjectResolution/LegacyTransientObjectsResolver.cs

@@ -17,7 +17,7 @@ namespace Umbraco.Core.ObjectResolution
 	/// these old classes don't contain metadata, the objects need to be instantiated first to get their metadata, we then store this
 	/// for use in the GetById method.
 	/// </remarks>
-	internal abstract class LegacyTransientObjectsResolver<TResolver, TResolved> : ManyObjectsResolverBase<TResolver, TResolved>
+	internal abstract class LegacyTransientObjectsResolver<TResolver, TResolved> : LazyManyObjectsResolverBase<TResolver, TResolved>
 		where TResolved : class
 		where TResolver : class
 	{
@@ -27,16 +27,15 @@ namespace Umbraco.Core.ObjectResolution
 		/// <summary>
 		/// Constructor
 		/// </summary>
-		/// <param name="refreshers"></param>
+		/// <param name="types"></param>
 		/// <remarks>
 		/// We are creating Transient instances (new instances each time) because this is how the legacy code worked and
 		/// I don't want to muck anything up by changing them to application based instances. 
 		/// TODO: However, it would make much more sense to do this and would speed up the application plus this would make the GetById method much easier.
 		/// </remarks>
-		protected LegacyTransientObjectsResolver(IEnumerable<Type> refreshers)
-			: base(ObjectLifetimeScope.Transient) //  new objects every time
-		{
-			AddTypes(refreshers);
+		protected LegacyTransientObjectsResolver(Func<IEnumerable<Type>> types)
+			: base(types, ObjectLifetimeScope.Transient) //  new objects every time
+		{			
 		}
 		#endregion
 
@@ -55,7 +54,7 @@ namespace Umbraco.Core.ObjectResolution
 		protected abstract Guid GetUniqueIdentifier(TResolved obj); 
 
 		/// <summary>
-		/// Returns a new ICacheRefresher instance by id
+		/// Returns a new TResolved instance by id
 		/// </summary>
 		/// <param name="id"></param>
 		/// <returns></returns>