LSQL: relational migration merge - guide

[robm26]

Instructions for the new relational-migration workshop

Several readme files and static images. No code since this is retrieved by the user with git clone from another repository. Thank you!!!

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[switch180]

Requested changes:

1. Use a Parameter for the MySQL password and username instead of hard coding it. Follow the method seen here. Parameter at the top of the stack, referenced in the user data script
2. Pre-cache the code for the workshop on the C9 instance instead of having a git clone. UserData script. We will talk about this.
3. Provide the license for vehicles.png so we know we have the permission to use it on our lab
4. Update the main index.en.md to explain what technologies you will use. You should list them all out, with a separate section for AWS services and code frameworks.
5. Complete your changes by Friday :-)

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Feedback added on C9.yaml - please address the line comments

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Fix list:

• Add level to introduction of lab, and say whether this can be done on your own or at an aws event. explain if it has any accompanying material such as a pptx that are unavaible to the student. and add hyperlink to folder where the code exists in the other repo
• add a "on your own" and "at an aws event" setup
• setenv has hard coded password and username but should get values from CFN somehow
• Migrate this to the AWS DynamoDB Labs AWS account https://dynamodbworkshop.s3.amazonaws.com/migration/index.html
• Hard coded region in https://github.com/aws-samples/aws-dynamodb-examples/blob/master/workshops/relational-migration/migrate.sh
• content/relational-migration/summary/index.en.md add a hyperlink to your workshop source code for DIY migrations
• add required release to code samples that customers may use in production (AWS policy)
• remove hard coded AWS_DEFAULT_REGION in setenv.sh
• Hard code final commit version for aws-dynamodb-examples

Post launch checklist

• Review dataset and ensure we are using approved data

[switch180]

Patching userdata in #122

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Pulling up todos from some of the line items for later follow up:

• Share MySQL WB file for this ERD [static/images/relational-migration/relational_schema.png]
• content/relational-migration/data migration/index3.en.md add image to step 6 to show import from s3