[TEST] RT-2454 E2E tests for register page

RT-2454 #inreview
[TEST] e2e: Submit registration form
[FIX] e2e: Remove setScriptTimeout for register.js

Timeouts are configured globally in protractor.conf.js.
Merge pull request #1735 from jublonet/feature/2454-e2e-register

[TEST] E2E tests for register page (RT-2454)