Add an ability to export failure results

[AlexanderPoleschuk]

I'm submitting a ...

• feature request

What is the current behavior?

User had to navigate to TC info tab to view TmsLink info

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

What is the expected behavior?

As a user I'd like to have 1-click action feature to export all failed/broken/skipped test cases to some readable format representation.
The information in this representation should contain failed/broken sections, TmsLink value, method name(ideally) and fail reason. TestCaseID pattern should support TmsLink pattern, therefore be clickable.

E.g.

• Failed test cases

-- TestCaseID-111
--- testCaseMethodName1
---- failureReason1
-- TestCaseID-123
--- testCaseMethodName2
---- failureReason2

• Broken test cases

-- TestCaseID-222
--- testCaseMethodName3
---- failureReason3
-- TestCaseID-234
--- testCaseMethodName4
---- failureReason4

What is the motivation / use case for changing the behavior?

Better(faster) failed/broken test cases handling

Please tell us about your environment:

• Allure version: 2.1.1
• Test framework: testng@6.10
• Allure adaptor: allure-testng@2.0-BETA8

Other information

[baev]

related to #273

[baev]

should be fixed via #273