Patching: "GO" in the SQL script

[kavics]

The "GO" line in an SQL script causes an exception during patch execution.

[tusmester]

The script reader that is capable of splitting a script: SenseNet.ContentRepository.Storage.Data.MsSqlClient.SqlScriptReader Currently we use it only here: ExecuteEmbeddedNonQueryScriptAsync in the MsSqlDataProvider class. General Execute methods do not use this reader, maybe we should use it there so that the caller does not have to worry about it.