Database Charset Not Preserved

[alexgritton]

When running the script the database charset was not preserved. This will stop your emojis, or any special characters, from being transferred correctly. I recommend adding --default-character-set= in my case --default-character-set=utf8mb4 to both the mysqldump and mysql. Also for large databases I recommend removing the -v flag so every insert isn't printed to the console. I would also recommend not using Azure Cloud Shell as the timeout of 20 min is too short to successfully migrate a large database.