Fixed comparison with 0 bug for TableRate shipping carrier

In free shipping flow sometimes you ca get such query to DB:
SQL: SELECT `shipping_tablerate`.* FROM `shipping_tablerate` WHERE ...
BIND: array (
':website_id' => 1,
':country_id' => 'US',
':region_id' => 12,
':postcode' => '68138',
':condition_name' => 'package_value',
':condition_value' => -3.5527136788005009E-15,
)
AFF: 0

It leads to disabled TabelRate shipping method. Such value is calculated in Magento\OfflineShipping\Model\Carrier\Tablerate::collectRates(). Smth like:
  29.95 - 10 - 19 - .95 = -3.5527136788005009E-15
and normally should be rounded before comparison. See http://php.net/manual/en/language.types.float.php

Author: Vadim Kusakin

app/code/Magento/OfflineShipping/Model/ResourceModel/Carrier/Tablerate/RateQuery.php

@@ -99,7 +99,7 @@ public function getBindings()
             }
         } else {
             $bind[':condition_name'] = $this->request->getConditionName();
-            $bind[':condition_value'] = $this->request->getData($this->request->getConditionName());
+            $bind[':condition_value'] = round($this->request->getData($this->request->getConditionName()), 4);
         }
 
         return $bind;