Inspection required before delivery isn't working for item variants (#9362)

* makes `copy_attributes_to_variant` to not ignore "Table"

* fixes test cases - `test_auto_material_request` and `test_auto_material_request_for_variant`

* adds test case - tables in templates should be copied to variants

* [ci] use deprecated trusty build for now
diff --git a/erpnext/controllers/item_variant.py b/erpnext/controllers/item_variant.py
index 3349303..226b17f 100644
--- a/erpnext/controllers/item_variant.py
+++ b/erpnext/controllers/item_variant.py
@@ -169,6 +169,7 @@
 
 	return variant
 
+
 def copy_attributes_to_variant(item, variant):
 	from frappe.model import no_value_fields
 
@@ -181,8 +182,9 @@
 		exclude_fields += ['manufacturer', 'manufacturer_part_no']
 
 	for field in item.meta.fields:
-		if field.fieldtype not in no_value_fields and (not field.no_copy)\
-			and field.fieldname not in exclude_fields:
+		# "Table" is part of `no_value_field` but we shouldn't ignore tables
+		if (field.fieldtype == 'Table' or field.fieldtype not in no_value_fields) \
+			and (not field.no_copy) and field.fieldname not in exclude_fields:
 			if variant.get(field.fieldname) != item.get(field.fieldname):
 				variant.set(field.fieldname, item.get(field.fieldname))
 	variant.variant_of = item.name