[vm] add disks inlined to VMs

uncloud_vm/admin.py

@@ -3,5 +3,13 @@ from django.contrib import admin
 # Register your models here.
 from uncloud_vm.models import *
 
-admin.site.register(VMProduct)
+class VMDiskInline(admin.TabularInline):
+    model = VMDiskProduct
+
+class VMProductAdmin(admin.ModelAdmin):
+    inlines = [
+        VMDiskInline,
+    ]
+
+admin.site.register(VMProduct, VMProductAdmin)
 admin.site.register(VMDiskProduct)