Update delete object log in case of a master version expiration

This does not prevent any race condition but at least leaves a
log when it happens.

Issue: CLDSRV-613

Author: Seragonia

lib/api/objectDelete.js

@@ -87,6 +87,20 @@ function objectDeleteInternal(authInfo, request, log, isExpiration, cb) {
                     // versioning has been configured
                     return next(null, bucketMD, objMD);
                 }
+
+                if (versioningCfg && versioningCfg.Status === 'Enabled' &&
+                    objMD.versionId === reqVersionId && isExpiration) {
+                        log.warn('expiration is trying to delete a master version ' +
+                        'of an object with versioning enabled', {
+                            method: 'objectDeleteInternal',
+                            isExpiration,
+                            reqVersionId,
+                            versionId: objMD.versionId,
+                            replicationState: objMD.replicationInfo,
+                            location: objMD.location,
+                            originOp: objMD.originOp,
+                        });
+                    }
                 if (reqVersionId && objMD.location &&
                     Array.isArray(objMD.location) && objMD.location[0]) {
                     // we need this information for data deletes to AWS