BI-972 - Testing Automation Framework (TAF) Button ID selectors

[HMS17]

Modifying steps in TAF to use new ID selectors for buttons rather than xpaths.

Linked to Breeding-Insight/bi-web#97 which adds the necessary IDs

Buttons (with associated TAF scenario for testing)

• Download the Trait Import Template (BI-809)
• Choose a file… (BI-809, BI-810)
• Choose a different file… (BI-917, BI-923)
• Import (BI-810, BI-917)
• Yes, abort (BI-919, BI-921)
• Log out (BI-803)
• Home (BI-822)
• Program Management (BI-822)
• Traits (BI-822)
• Import File
• BrAPI

(Note: BI-917, BI-923, and BI-921 have steps with non-button selectors that are failing)

[cvacalares]

I will be moving the selectors to the page.
Most of them are a quick implementation since I'm still trying to organize the page object.