Change user_context to domain_name as the cache uses domain name not the context.

Context and domain are usually the same but there could be times that they are different. However code is always using the domain name for the cache key.

app/extensions/app_config.php

@@ -311,7 +311,7 @@
 		$apps[$x]['default_settings'][$y]['default_setting_description'] = "Default value to set whether to record inbound, outbound, or all calls.";
 
 	//cache details
-		$apps[$x]['cache']['key'] = "directory.\${extension}@\${user_context}";
+		$apps[$x]['cache']['key'] = "directory.\${extension}@\${domain_name}";
 
 	//schema details
 		$y=0;