custom auth titles now use go through i18n

this is so when users switch between locales the custom titles also update
change API for custom auth titles
swap double for single quotes
Merge pull request #705 from moneyadviceservice/custom-titles-use-i18n

Custom titles use i18n
Add @enable-car_cost_tool to avoid test env requiring features.yml configuration
Merge pull request #706 from moneyadviceservice/enable_car_cost_tool_feature_flag_on_scenarios

Add @enable-car_cost_tool to avoid test env requiring features.yml config
bump budget_planner 4.0.0.641 => 4.0.0.642
bump budget_planner 4.0.0.642 => 4.0.0.643
Bump pensions_calculator from 0.2.0.467 to 0.2.0.478
Bumps pensions_calculator from 0.2.0.478 to 0.2.0.480
Bump dough version
Refactor campaign trust banner into a separate layout
Offset logo and clean up commented out code.
Merge pull request #708 from moneyadviceservice/campaign-trust-banner

Campaign trust banner
Add interest rates rise campaign promo to the homepage
Change routing to new interest-rates-rise URL
Merge pull request #707 from moneyadviceservice/interest-campaign-live

Change routing to new interest-rates-rise URL
Fix missing Welsh link to campaign page
Fix campaign controller spec test fail
Fix post-rebase loss of campaign trust banner rendering in campaign view