[SYNCOPE-1848] return user memberships with SCIM search endpoint

Author: SamuelGaro

ext/scimv2/scim-rest-cxf/src/main/java/org/apache/syncope/ext/scimv2/cxf/service/AbstractSCIMService.java

@@ -189,7 +189,7 @@ protected ListResponse<R> doSearch(final Resource type, final SCIMSearchRequest
                 PageRequest.of(page, itemsPerPage, Sort.by(sort)),
                 SyncopeConstants.ROOT_REALM,
                 true,
-                false);
+                true);
 
         if (result.getTotalElements() > confManager.get().getGeneralConf().getFilterMaxResults()) {
             throw new BadRequestException(ErrorType.tooMany, "Too many results found");

fit/core-reference/src/test/java/org/apache/syncope/fit/core/SCIMITCase.java

@@ -451,6 +451,7 @@ public void search() {
             });
             assertNotNull(users);
             assertEquals(1, users.getTotalResults());
+            assertFalse(users.getResources().get(0).getGroups().isEmpty());
 
             // Extension User
             response = webClient().path("Users").query(