Remove duplicate import bookmarks folder by

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

1. remove dup folder in addSite
2. fix missing parentFolderId and partionNumber

fix #4222

Auditors: @bsclifton, @bbondy

Test Plan:
Import bookmarks twice, there should not be duplicate folders

[bbondy]

thanks!