Improves StoragePoolAllocators' logs

Applies sugested changes

Author: Julien Hervot de Mattos Vaz

engine/storage/src/main/java/org/apache/cloudstack/storage/allocator/ClusterScopeStoragePoolAllocator.java

@@ -100,7 +100,7 @@ protected List<StoragePool> select(DiskProfile dskCh, VirtualMachineProfile vmPr
             }
             StoragePool storagePool = (StoragePool)dataStoreMgr.getPrimaryDataStore(pool.getId());
             if (filter(avoid, storagePool, dskCh, plan)) {
-                logger.debug(String.format("Found suitable cluster storage pool [%s] to allocate disk [%s] to it, adding to list.", pool, dskCh));
+                logger.debug("Found suitable cluster storage pool [{}] to allocate disk [{}] to it, adding to list.", pool, dskCh);
                 suitablePools.add(storagePool);
             } else {
                 logger.debug(String.format("Adding storage pool [%s] to avoid set during allocation of disk [%s].", pool, dskCh));

engine/storage/src/main/java/org/apache/cloudstack/storage/allocator/ZoneWideStoragePoolAllocator.java

@@ -96,7 +96,7 @@ protected List<StoragePool> select(DiskProfile dskCh, VirtualMachineProfile vmPr
             }
             StoragePool storagePool = (StoragePool)this.dataStoreMgr.getPrimaryDataStore(storage.getId());
             if (filter(avoid, storagePool, dskCh, plan)) {
-                logger.debug(String.format("Found suitable zone wide storage pool [%s] to allocate disk [%s] to it, adding to list.", storagePool, dskCh));
+                logger.debug("Found suitable zone wide storage pool [{}] to allocate disk [{}] to it, adding to list.", storagePool, dskCh);
                 suitablePools.add(storagePool);
             } else {
                 if (canAddStoragePoolToAvoidSet(storage)) {

plugins/storage-allocators/random/src/main/java/org/apache/cloudstack/storage/allocator/RandomStoragePoolAllocator.java

@@ -66,7 +66,7 @@ public List<StoragePool> select(DiskProfile dskCh, VirtualMachineProfile vmProfi
             StoragePool pol = (StoragePool)this.dataStoreMgr.getPrimaryDataStore(pool.getId());
 
             if (filter(avoid, pol, dskCh, plan)) {
-                logger.trace(String.format("Found suitable storage pool [%s], adding to list.", pool));
+                logger.trace("Found suitable storage pool [{}], adding to list.", pool);
                 suitablePools.add(pol);
             }
         }