change variable name for storage info

Author: TSI-ashishsharma

lib/Service/MailSender.php

@@ -158,13 +158,13 @@ private function handleStorage(IEMailTemplate $emailTemplate, IUser $user): bool
 			// Message no quota
 			$this->provider->writeStorageNoQuota($emailTemplate, $storageInfo);
 			return false;
-		} elseif ($storageInfo['usage_relative'] < 90) {
+		} elseif ($storageInfo['relative'] < 90) {
 			// Message quota but less than 90% used
 			$this->provider->writeStorageSpaceLeft($emailTemplate, $storageInfo);
 			return false;
-		} elseif ($storageInfo['usage_relative'] < 99) {
+		} elseif ($storageInfo['relative'] < 99) {
 			$this->provider->writeStorageWarning($emailTemplate, $storageInfo);
-			return true;
+			return false;
 		} else {
 			$this->provider->writeStorageFull($emailTemplate, $storageInfo);
 			return true;