Energy grants calculator - April 6 changes

logic changes
new options to two questions
copy changes
Updating logic and adding new outcome

dding outcome
Adding logic to take user to new outcome
Updating test for social housing tenant

Updating test for social housing tenant & income support with child
under 16
Updated to make uprating happen automatically

Reworked flow
Added timecop tests
Update to tests

updated timecop tests
tweaking tests

reworking timecop tests slightly
final tweakery of tests
Merge pull request #260 from alphagov/energy-grants-calculator

Energy grants calculator - April 6 changes