Update default configuration to include `from_name` values

conf/defaults.ini

@@ -296,6 +296,7 @@ cert_file =
 key_file =
 skip_verify = false
 from_address = admin@grafana.localhost
+from_name = Grafana Admin
 
 [emails]
 welcome_email_on_sign_up = false

conf/sample.ini

@@ -282,6 +282,7 @@
 ;key_file =
 ;skip_verify = false
 ;from_address = admin@grafana.localhost
+;from_name = Grafana Admin
 
 [emails]
 ;welcome_email_on_sign_up = false