Implemented MySql DB service

[jayant1616]

Pull request checklist

Please check if your PR 🚀 fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run start) was run locally and new changes were working correctly
• Lint (npm run linter) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Fixes #

#13 (comment)

What is the new behavior?

The class MySqlService implements DriverWrapper. TestMysql.ts is used to test the methods of MySqlService

Does this introduce a breaking change?

• Yes
• No

Other information