Fix bug during assertion of connection role.

ROLE was not being sent to master when still disconnected and with an
empty slaves pool preventing the client from checking the actual role
of the server upon connect().

src/Connection/Aggregate/SentinelReplication.php

@@ -535,7 +535,7 @@ class SentinelReplication implements ReplicationInterface
     {
         $connection = $this->getConnectionInternal($command);
 
-        if (!$connection->isConnected() && $this->slaves) {
+        if (!$connection->isConnected() && ($this->slaves || $this->master)) {
             $this->assertConnectionRole(
                 $connection,
                 $this->strategy->isReadOperation($command) ? 'slave' : 'master'