<refactor>[core]: add hibernate.default_batch_fetch_size=50 to reduce N+1 SQL queries

Reduces SQL count from ~52 to ~6 for VM queries and ~32 to ~5 for Host
queries by enabling Hibernate batch fetching for EAGER collections.

Resolves: ZSTAC-79217

Change-Id: I6bb2a852c1f3f3780f2bc6cf90ce330ae1b6d9fb

Author: Minrit

conf/springConfigXml/DatabaseFacade.xml

@@ -87,7 +87,8 @@
                 <!--.8.2.x infinispan not support async https://issues.redhat.com/browse/ISPN-4065 -->
                 <prop key="hibernate.search.default.worker.execution">sync</prop>
                 <!--<prop key="hibernate.search.default.index_flush_interval">${IndexWorker.flushInterval:1000}</prop>-->
-                <prop key="hibernate.globally_quoted_identifiers">true</prop>
+                <prop key="hibernate.globally_quoted_identifiers">true</prop>
+                <prop key="hibernate.default_batch_fetch_size">50</prop>
             </props>
         </property>
     </bean>