Fixes upgrade issues with SQLCE and DateTime:

* DateTime's during migrations are formatted in a very explicit way
* Migration's that need to execute multiple statements are fixed in SQLCE by splitting on GO

src/Umbraco.Core/Persistence/SqlSyntax/MySqlSyntaxProvider.cs

@@ -203,7 +203,7 @@ ORDER BY TABLE_NAME, INDEX_NAME",
         /// </remarks>
         public override string FormatDateTime(DateTime date, bool includeTime = true)
         {
-            return includeTime ? date.ToString("YYYYMMDDHHmmss") : date.ToString("YYYYMMDD");
+            return includeTime ? date.ToString("yyyyMMddHHmmss") : date.ToString("yyyyMMdd");
         }
 
         public override string GetQuotedTableName(string tableName)