Adding the following Test Coverage:

Use mysql_user module to create, delete users.
Update user password and ensure new password was updated for the correct user.
Assert user has access to multiple databases
Assert user creation, deleting using different user privilege and ensure privilege work correctly.
Merge branch 'integration_mysql_user' of https://github.com/wrosario/ansible into wrosario-integration_mysql_user
Merge branch 'wrosario-integration_mysql_user' into devel