Rely on original security context even for profiles

When multiple security filters are used, a pac4j security context
can rely on an already authenticated pac4j security context.
In this case, it must delegate to the original if it doesn't itself
have some profiles stored.

core/src/main/java/org/pac4j/jax/rs/pac4j/JaxRsProfileManager.java

@@ -56,6 +56,8 @@ public Pac4JSecurityContext(SecurityContext original, JaxRsContext context,
         public Optional<Collection<CommonProfile>> getProfiles() {
             if (principal != null) {
                 return Optional.of(Collections.unmodifiableCollection(profiles));
+            } else if (original instanceof Pac4JSecurityContext) {
+                return ((Pac4JSecurityContext) original).getProfiles();
             } else {
                 return Optional.empty();
             }