Issues saving multiple Custom Attachments with certain metadata paths

[mrblippy]

When saving multiple Custom Attachments in the same item the first attachment uploads fine, but any subsequent attachment data gets saved inside the item metadata, instead of the attachment table.

That means only the first attachment will be visible in the item summary.

Based on my testing this will only occur if It is caused when the attachment metadata path is is laid out in a very specific way: /item/{anyNodeName}/attachments/{anyNodeName}

So, for example /item/localData/attachments/resources would cause the bug to happen. As part of my local testing something like /item/charlietest/attachments/charlie would also cause the same bug.

I'm by no means a python or EBI expert, but it seems like

openEQUELLA-ebi/source/Engine.py

Line 2090 in 71f3e2d

item.getXml().root.getElementsByTagName("item")[0].getElementsByTagName("attachments")[0].appendChild(attachmentElement.root.cloneNode(True))

is at fault.

Steps to reproduce

1. Import the attached schema and collections into an oEQ institution
2. Publish an item in the collection
3. Download the attached .csv file
4. In the Target column of the csv, replace the uuids with the uuid of your published item
5. Start the EBI, and import the attached settings file (using the top menu)
6. Click the 'Start Import' button.
7. Go to the item in oEQ, notice there is only one attachment, when there should be two.

Files to reproduce issue.zip