MAGETWO-38779: Stabilize story

app/code/Magento/Eav/Model/Entity/VersionControl/Metadata.php

@@ -18,7 +18,8 @@ class Metadata extends \Magento\Framework\Model\Resource\Db\VersionControl\Metad
      */
     public function getFields(\Magento\Framework\Object $entity)
     {
-        if (!isset($this->metadataInfo[get_class($entity)])) {
+        $entityClass = get_class($entity);
+        if (!isset($this->metadataInfo[$entityClass])) {
             $fields = $entity->getResource()->getReadConnection()->describeTable(
                 $entity->getResource()->getEntityTable()
             );
@@ -30,9 +31,9 @@ class Metadata extends \Magento\Framework\Model\Resource\Db\VersionControl\Metad
                 null
             );
 
-            $this->metadataInfo[get_class($entity)] = $fields;
+            $this->metadataInfo[$entityClass] = $fields;
         }
 
-        return $this->metadataInfo[get_class($entity)];
+        return $this->metadataInfo[$entityClass];
     }
 }

lib/internal/Magento/Framework/Model/Resource/Db/VersionControl/Metadata.php

@@ -24,8 +24,9 @@ class Metadata
      */
     public function getFields(\Magento\Framework\Object $entity)
     {
-        if (!isset($this->metadataInfo[get_class($entity)])) {
-            $this->metadataInfo[get_class($entity)] =
+        $entityClass = get_class($entity);
+        if (!isset($this->metadataInfo[$entityClass])) {
+            $this->metadataInfo[$entityClass] =
                 array_fill_keys(
                     array_keys(
                         $entity->getResource()->getReadConnection()->describeTable(
@@ -35,6 +36,6 @@ class Metadata
                     null
                 );
         }
-        return $this->metadataInfo[get_class($entity)];
+        return $this->metadataInfo[$entityClass];
     }
 }

lib/internal/Magento/Framework/Model/Resource/Db/VersionControl/Snapshot.php

@@ -60,10 +60,11 @@ class Snapshot
             return true;
         }
 
-        if (!isset($this->snapshotData[get_class($entity)][$entity->getId()])) {
+        $entityClass = get_class($entity);
+        if (!isset($this->snapshotData[$entityClass][$entity->getId()])) {
             return true;
         }
-        foreach ($this->snapshotData[get_class($entity)][$entity->getId()] as $field => $value) {
+        foreach ($this->snapshotData[$entityClass][$entity->getId()] as $field => $value) {
             if ($entity->getDataByKey($field) != $value) {
                 return true;
             }