Leave Server module running until end of shutdown

We want the process to answer requests (including status and metrics)
until it has finished shutting down.

Every target depends on Server, so it will get shut down as a dependency.

Signed-off-by: Bryan Boreham <[email protected]>

Author: bboreham

pkg/cortex/cortex.go

@@ -221,7 +221,6 @@ func (t *Cortex) Run() error {
 
 // Stop gracefully stops a Cortex.
 func (t *Cortex) Stop() error {
-	t.server.Shutdown()
 	t.stop(t.target)
 	return nil
 }