use assertArrayHasKey in ConfigurationTest
use assertArrayHasKey in ConfigurationTest

this seems more accurate, and fixes a bug when trying to remove
the compat_headers option.

lyrixx/NelmioSecurityBundle,stof/NelmioSecurityBundle,romainneutron/NelmioSecurityBundle,romainneutron/NelmioSecurityBundle,nelmio/NelmioSecurityBundle