Update Test related gems

What does this MR do?

Update Test related gems

Upgrade to latest possible versions the following gems:

• capybara
• capybara-screenshot
• selenium-webdriver

Updated specs to fix inconsistencies with capybara 3.x

Does this MR meet the acceptance criteria?

• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.