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
Debt Free Day Integration: add local path import to the Gemfile
Debt Free Day Integration: update schema.rb after running migrations
Revert "Debt Free Day Integration: update schema.rb after running migrations"

This reverts commit b722e479e546d7e8315e9ebc0c5fb3a122811e71.
Debt Free Day Integration: redo update schema.rb after running migrations

Previous attempt included an invalid migration which bumped the schema
version artificially.
Debt Free Day Integration: Make sure the engine inherits the correct controller / layout
Debt Free Day Integration: add a feature to test integration
Debt Free Day Integration: WIP support route for the loan calculator
Debt Free Day Integration: add cassettes for debt and borrowing categories
Debt Free Day Integration: Change locale key to match locale structure in engine.
Debt Free Day Integration: Revert override of ToolMountPoint method pending integration of two calculators.
Debt Free Day Integration: implement request matcher in the tool mount point