Migrate operation-log-spec.js tests into TestCafe

[gbetances089]

Tests Path

Feature: the navigation to the operation log menu Tests:

• should be possible via URL
• should be possible via header menu

Feature: the operation log table Tests:

• should display a note for empty operation logs
• should display columns by default
• should have a dropdown with more columns to add
• should allow to add a column
• should allow to remove a column

Feature: the operation log search field Tests:

• should allow to use different filter criteria

Feature: operation log with more than 50 entries Tests:

• should display a load more entries button
• should load 50 more entries

[gbetances089]

Almost all the tests were already cover except for this one:

Feature: operation log with more than 50 entries Tests:

• should display a load more entries button
• should load 50 more entries

Which is now added via this ticket.