For the convenience of users who want to selectively override the
access rules in an application without taking complete control of the
security configuration we now have some constants:
* SecurityProperties.ACCESS_OVERRIDE_ORDER for overriding just the
application endpoint access rules
* ManagementServerProperties.ACCESS_OVERRIDE_ORDER for overriding the
application endpoint and management endpoint access rules
Fixes gh-803
This fixes a bug in the sample, where the AuthenticationManager it builds
is a local one for the filter chain containing "/login", whereas it was
expecting to override the Boot default, which is "global". The fix is
to extract the authentication configuration out into a
GlobalAuthenticationConfigurerAdapter.
Fixes gh-699
