Add property for multitenancy

src/main/java/ca/uhn/fhir/jpa/starter/FhirServerConfigCommon.java

@@ -135,7 +135,14 @@ public class FhirServerConfigCommon {
 
   @Bean
   public PartitionSettings partitionSettings() {
-    return new PartitionSettings();
+    PartitionSettings retVal = new PartitionSettings();
+
+    // Partitioning
+    if (HapiProperties.getPartitioningMultitenancyEnabled()) {
+      retVal.setPartitioningEnabled(true);
+    }
+
+    return retVal;
   }