cloud_discovery: run est_client enroll before discovery process

Always obtain EST certificates before starting the discovery process.
This ensures certificates are already available from the EST server, since
the FQDN may be provided via DHCP discovery or another discovery method,
and requires valid certificates to proceed.

Fixes: WIFI-15123

Signed-off-by: Marek Kwaczynski <marek@shasta.cloud>

feeds/tip/cloud_discovery/files/usr/bin/cloud_discovery

@@ -260,11 +260,11 @@ function interval_handler() {
 		if (!time_is_valid())
 			return;
 
-		discovery_method = DISCOVER_DHCP;
-		if (discover_dhcp())
+		if (system('/usr/bin/est_client enroll'))
 			return;
 
-		if (system('/usr/bin/est_client enroll'))
+		discovery_method = DISCOVER_DHCP;
+		if (discover_dhcp())
 			return;
 
 		discovery_method = DISCOVER_FLASH;