Log missing TLS certificates as a warning rather than an error (#153)

TLS is enabled by default and uploading certificates over HTTP needs to
happen after the application has started, so the user cannot avoid this
message when using HTTP rather than SSH.

The warning message already exists in tls_log_missing_cert_certs(),
so this change only removes the generic error message at the call site.

Co-authored-by: Mattias Axelsson <mattiaax@axis.com>

app/dockerdwrapperwithcompose.c

@@ -412,12 +412,8 @@ static bool read_settings(struct settings* settings, const struct app_state* app
         // when TCP won't be used. If the setting is changed we will loop through
         // this function again.
         settings->use_tls = false;
-    else {
-        if (!get_and_verify_tls_selection(param_handle, &settings->use_tls)) {
-            log_error("Failed to verify tls selection");
-            return false;
-        }
-    }
+    else if (!get_and_verify_tls_selection(param_handle, &settings->use_tls))
+        return false;
 
     settings->use_ipc_socket = is_parameter_yes(param_handle, PARAM_IPC_SOCKET);