Update change_password

change password hashing from password_hash to md5

change_password

@@ -18,7 +18,7 @@ echo $docRoot;
 
 echo "changing password for  user $username\n";
 
-$passwordhash = password_hash($password,  PASSWORD_DEFAULT);
+$passwordhash = md5($password,  PASSWORD_DEFAULT);
 
 
 Zotero_DB::beginTransaction();