feat: add validation code of cost when it doesn't exist in csv file

Signed-off-by: seolmin <seolmin@megazone.com>

Author: seolmin

src/cloudforet/cost_analysis/manager/cost_manager.py

@@ -46,6 +46,9 @@ def _make_cost_data(self, results):
             if not self._convert_cost_and_usage_quantity_types(result):
                 continue
 
+            if not self._exist_cost_and_usage_quantity(result):
+                continue
+
             self._check_required_fields(result)
 
             try:
@@ -141,6 +144,13 @@ def _convert_cost_and_usage_quantity_types(result):
             return False
         return True
 
+    @staticmethod
+    def _exist_cost_and_usage_quantity(result):
+        if result['cost'] or result['usage_quantity']:
+            return True
+        else:
+            return False
+
     @staticmethod
     def _check_required_fields(result):
         for field in _REQUIRED_FIELDS: