Remove test data that's unnecessary for the test
Extract need data into test helper
Reduce test data duplication for BrowsingNeedsTest
Simplify test data in CloseAsDuplicateTest
Wrap test data in ExportingNeedsTest
Simplify test data for FilteringNeedsTest
Simplify test data for ReopeningNeedsTest
Update 'gds-api-adapters' to latest

This allows making changes to the test helpers.
The test has had to change because the `GdsApi::HTTPErrorResponse` class has
changed.
Merge pull request #125 from alphagov/test-improvements

Test data improvements
Merge pull request #126 from alphagov/bump-gds-api-adapters

Update 'gds-api-adapters' to latest
Encapsulate "need in scope?" logic in a method
Don't send the 'in_scope' flag to the Need API

This is superceded by the 'status' attribute.