crypto: remove duplication loading x509 CA cert

The CA cert is mandatory in both client and server scenarios.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

crypto/tlscredsx509.c

@@ -578,11 +578,14 @@ qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds,
 
     trace_qcrypto_tls_creds_x509_load(creds, creds->parent_obj.dir);
 
+    if (qcrypto_tls_creds_get_path(&creds->parent_obj,
+                                   QCRYPTO_TLS_CREDS_X509_CA_CERT,
+                                   true, &cacert, errp) < 0) {
+        return -1;
+    }
+
     if (isServer) {
         if (qcrypto_tls_creds_get_path(&creds->parent_obj,
-                                       QCRYPTO_TLS_CREDS_X509_CA_CERT,
-                                       true, &cacert, errp) < 0 ||
-            qcrypto_tls_creds_get_path(&creds->parent_obj,
                                        QCRYPTO_TLS_CREDS_X509_CA_CRL,
                                        false, &cacrl, errp) < 0 ||
             qcrypto_tls_creds_get_path(&creds->parent_obj,
@@ -598,9 +601,6 @@ qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds,
         }
     } else {
         if (qcrypto_tls_creds_get_path(&creds->parent_obj,
-                                       QCRYPTO_TLS_CREDS_X509_CA_CERT,
-                                       true, &cacert, errp) < 0 ||
-            qcrypto_tls_creds_get_path(&creds->parent_obj,
                                        QCRYPTO_TLS_CREDS_X509_CLIENT_CERT,
                                        false, &cert, errp) < 0 ||
             qcrypto_tls_creds_get_path(&creds->parent_obj,