MODORDERS-962. Update Get titles query to check acq units from title …

…instead of purchase order (#799)

* MODORDERS-962. Update Get titles query to check acq units from title instead of purchase order

src/main/java/org/folio/service/titles/TitlesService.java

@@ -13,6 +13,7 @@
 import java.util.Map;
 import java.util.function.Function;
 
+import org.apache.commons.lang3.StringUtils;
 import org.folio.orders.utils.HelperUtils;
 import org.folio.rest.core.RestClient;
 import org.folio.rest.core.models.RequestContext;
@@ -52,7 +53,7 @@ public Future<Title> createTitle(Title title, RequestContext requestContext) {
   }
 
   public Future<TitleCollection> getTitles(int limit, int offset, String query, RequestContext requestContext) {
-    return acquisitionsUnitsService.buildAcqUnitsCqlExprToSearchRecords("purchaseOrder.", requestContext)
+    return acquisitionsUnitsService.buildAcqUnitsCqlExprToSearchRecords(StringUtils.EMPTY, requestContext)
       .compose(acqUnitsCqlExpr -> {
         String resultQuery = acqUnitsCqlExpr;
         if (!isEmpty(query)) {