Validating file with UUIDs and display an error message if invalid

Purpose:

Validate file with UUIDs for extension (should be csv) and in case of validation error display a callout message.

Acceptance criteria:

Scenarios

1. Scenario 1
   • Given the query file has been dropped to the file uploader area
   • When a file to upload does not pass validation
   • Then an error modal should with an appropriate message be displayed (see Screen Shot 2020-02-20 at 11.09.26.png attachment)

1. Scenario 2
   • Given the query file has been dropped to the file uploader area
   • When a file to upload passes validation
   • Then an error modal should not be displayed

1. Scenario 3
   • Given the query file has been dropped to the file uploader area and the error modal is already shown
   • When a user clicks on Cancel button
   • Then an error modal should disappear

1. Scenario 4
   • Given the query file has been dropped to the file uploader area and the error modal is already shown
   • When a user clicks on Choose file button
   • Then a choose file modal should be shown from which user can choose file

NOTE: The code coverage on the new code should be above 80%;