Avoid exception on iterative search with paging

When searchObjectsIterative is called in state that implicitly
results in iteration based on strictly sequential paging, and an
incompatible custom paging is requested, we now issue a warning
and switch to SIMPLE_PAGING iteration. (Originally we thrown
an exception there.)

repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/SqlRepositoryServiceImpl.java

@@ -826,11 +826,10 @@ public <T extends ObjectType> SearchResultMetadata searchObjectsIterative(Class<
 		        	if (isCustomPagingOkWithPagedSeqIteration(query)) {
 				        iterationMethod = IterationMethodType.STRICTLY_SEQUENTIAL_PAGING;
 			        } else {
-		        		// TODO switch to LOGGER.error
-		        		throw new IllegalArgumentException("Iterative search was defined in the repository configuration, and strict sequentiality "
+		        		LOGGER.warn("Iterative search was defined in the repository configuration, and strict sequentiality "
 						        + "was requested. However, a custom paging precludes its application. Therefore switching to "
 						        + "simple paging iteration method. Paging requested: " + query.getPaging());
-				        //iterationMethod = IterationMethodType.SIMPLE_PAGING;
+				        iterationMethod = IterationMethodType.SIMPLE_PAGING;
 			        }
 		        } else {
 		        	iterationMethod = IterationMethodType.SIMPLE_PAGING;