NXT-9751: Add ui tests from enact/i18n to agate

[alexandrumorariu]

Checklist

• I have read and understand the contribution guide
• A CHANGELOG entry is included
• At least one test case is included for this feature or bug fix
• Documentation was added or is not needed
• This is an API breaking change

Issue Resolved / Feature Added

Added ui-tests for enact/i18n in agate library so we can run them injenkins jobs. Changed travis file to reflect the change.

Resolution

Additional Considerations

Before merge please change the target enact branch back to develop in the travis file.

Links

NXT-9751

Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.08%. Comparing base (a4f50d3) to head (4f5aead).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #856   +/-   ##
========================================
  Coverage    85.08%   85.08%           
========================================
  Files          118      118           
  Lines         4491     4491           
  Branches      1226     1226           
========================================
  Hits          3821     3821           
  Misses         517      517           
  Partials       153      153           

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