bll/storage: don't check source domain space on lsm

When doing a LiveStorageMigration, the code checked if the disk/image
would fit not only on the destination, but also on the source.
This because theoretically the snapshot image can grow until the
disksize.

But this means that we needed to live migrate a 1TB disk, also at least
1TB of free space on the source domain.
This is quite useless, and causes problemns to move disks from for
example an already overloaded source domain.

As this check is neither being done when creating a simple snapshot,
just drop the check on the source domain.

Signed-off-by: Jean-Louis Dupond <jean-louis@dupond.be>

backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/storage/disk/MoveOrCopyDiskCommand.java

@@ -715,7 +715,7 @@ protected MultipleDiskVmElementValidator createMultipleDiskVmElementValidator()
                 diskVmElementDao.getAllDiskVmElementsByDiskId(getParameters().getImageGroupID()));
     }
 
-    protected MultipleStorageDomainsValidator createMultipleStorageDomainsValidator() {
+    public MultipleStorageDomainsValidator createMultipleStorageDomainsValidator() {
         List<Guid> sdsToValidate = new ArrayList<>();
         sdsToValidate.add(getStorageDomainId());
 

backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/storage/lsm/LiveMigrateDiskCommand.java

@@ -1,6 +1,5 @@
 package org.ovirt.engine.core.bll.storage.lsm;
 
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -26,7 +25,6 @@
 import org.ovirt.engine.core.bll.tasks.CommandHelper;
 import org.ovirt.engine.core.bll.tasks.interfaces.CommandCallback;
 import org.ovirt.engine.core.bll.utils.PermissionSubject;
-import org.ovirt.engine.core.bll.validator.storage.MultipleStorageDomainsValidator;
 import org.ovirt.engine.core.bll.validator.storage.StorageDomainValidator;
 import org.ovirt.engine.core.common.AuditLogType;
 import org.ovirt.engine.core.common.FeatureSupported;
@@ -684,16 +682,6 @@ protected boolean validateDestDomainsSpaceRequirements() {
         return true;
     }
 
-    @Override
-    protected MultipleStorageDomainsValidator createMultipleStorageDomainsValidator() {
-        List<Guid> sdsToValidate = new ArrayList<>();
-
-        sdsToValidate.add(getParameters().getSourceDomainId());
-        sdsToValidate.add(getParameters().getDestDomainId());
-
-        return new MultipleStorageDomainsValidator(getStoragePoolId(), sdsToValidate);
-    }
-
     private DiskImage getDiskImageByImageId(Guid imageId) {
         if (diskImagesMap.containsKey(imageId)) {
             return diskImagesMap.get(imageId);