[Case 7] attache Spark demo

[Case 7] add rd_date column and Fix rd_number

[Case 7] Fix error "java.sql.SQLException: LZ4 is not supported."

[Case 7] Fix port misprint

[Case 7] Remove unused repositories

[Case 7] Add dataset description

[Case 5] Add dataset

[Case 6] remove unused repos

[Case 6] remove misprint

[Case 6] move to folder

[Case 6] Add implementation

Initial structure