add prefixed ROLE_ to granted authorities to work with out-of-the-box

spring security

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/PermissionUtils.java

@@ -36,6 +36,9 @@ public final class PermissionUtils {
 
         for (final String role : roles) {
             authorities.add(new SimpleGrantedAuthority(role));
+            // add spring security ROLE authority which is indicated by the
+            // `ROLE_` prefix
+            authorities.add(new SimpleGrantedAuthority("ROLE_" + role));
         }
 
         return authorities;