XS2A Adapter Release 0.1.6

Notices:

• Updated Adapter models to conform to BG NextGen PSD2 specification
  1.3.8 2020-11-18v1

• wiremock.validation.enabled property is moved from
  adapter.config.properties into application.yml. A user can
  configure Wiremock stubs validation via application YAML file or by
  passing this flag into AdapterServiceLoader constructor.

• Updated crealogix-adapter: Authorization header presence is
  checked for each request now.

Fixes:

• Fixed Crealogix Adapter Pre-Step: added missing mandatory
  PSD2-AUTHORIZATION header