revert changes to the router model

vendor is moved back into the router product block

gso/api/v1/imports.py

@@ -12,9 +12,8 @@ from pydantic import BaseModel, root_validator, validator
 from pydantic.fields import ModelField
 
 from gso.products.product_blocks.iptrunk import IptrunkType, PhyPortCapacity
-from gso.products.product_blocks.router import RouterRole
+from gso.products.product_blocks.router import RouterRole, RouterVendor
 from gso.products.product_blocks.site import SiteTier
-from gso.products.product_types.router import RouterVendor
 from gso.services import subscriptions
 from gso.services.crm import CustomerNotFoundError, get_customer_by_name
 from gso.utils.helpers import (