Client wrapper: change connect API
Actual SOPC_ClientHelper_Connect create a new configuration each time it is called. This configuration is not part of the API.
In case of connection issues (connect failed or disconnection), the configurations are lost and cannot be deleted. As the number of configuration managed by the Toolkit is limited, after several called to connect, it is no longer possible to connect to the server.
SOPC_ClientHelper_Connect should be split in two functions, one to create a configuration and one to connect. Then, the configuration can be used when the connection failed or after a disconnection.