DateTime is object and working on same object is replacing both value… (#834)

* DateTime is object and working on same object is replacing both values to be same

This sets $d1 and $d2 both to "YYYY-mm-dd 23:59:59" ...

* Apply fixes from StyleCI

Author: gowrav-vishwakarma

src/TableColumn/FilterModel/TypeDatetime.php

@@ -92,7 +92,7 @@ public function setConditionForModel($m)
                     break;
                 case '!=':
                 case '=':
-                    $d1 = $this->getDatetime($filter['value'])->setTime(0, 0, 0);
+                    $d1 = clone $this->getDatetime($filter['value'])->setTime(0, 0, 0);
                     $d2 = $this->getDatetime($filter['value'])->setTime(23, 59, 59);
                     if ($d2 >= $d1) {
                         $value = $m->persistence->typecastSaveField($m->getField($filter['name']), $d1);