Task 5 s3 integration

[sherlaimov]

• importProductsFile lambda - https://ignte5pgm7.execute-api.eu-west-1.amazonaws.com/dev/import?name=test.csv

Optional tasks implamented:

• +10 (for JS only) - async/await is used in lambda functions
• +10 (All languages) - At the end of the stream the lambda function should move the file from the uploaded folder into the parsed folder (move the file means that file should be copied into a new folder in the same bucket called parsed, and then deleted from uploaded folder)