Create Test Database & Database testing

[evanderaimufua]

Test cases:

• [x] Check table presence in database schema
• [x] Check table name conventions
• [x] Check number of columns in a table
• [x] Check column names in a table
• [x] Check data type of columns in table
• [x] Check size of the columns in a table
• [x] Check nulls fields in a table

• [x] Check column keys in a table

  Provide supporting docs and upload pdfs