Merge branch '2.0.x' into 1.0.x

Author: allflame

src/Resources/config/services.yml

@@ -6,7 +6,6 @@ parameters:
   env(jaeger_context_format): 'text'
   env(jaeger_context_env): 'UBER_TRACE_ID'
   env(jaeger_context_header): 'uber-trace-id'
-  kernel.debug: false
   service_name: app
 services:
   spl.stack: