Fix AASX files of old version

[WelliSolutions]

The Python SDK can't deal with AASX files of old versions (see Issue #190). We can try to fix this by moving the nodes into the new version 3 namespace. There will be no guarantee that the fixed XML is actually compatible with the new version.

[WelliSolutions]

It requires more than just a namespace change. The complete document structure changed.

Old XML:

<?xml version="1.0"?>
<aas:aasenv xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:IEC61360="http://www.admin-shell.io/IEC61360/1/0" xsi:schemaLocation="http://www.admin-shell.io/aas/1/0 AAS.xsd http://www.admin-shell.io/IEC61360/1/0 IEC61360.xsd" xmlns:aas="http://www.admin-shell.io/aas/1/0">
  <aas:assetAdministrationShells>
    <aas:assetAdministrationShell>
      <aas:idShort>Festo_3S7PM0CP4BD</aas:idShort>
      <aas:category>CONSTANT</aas:category>
      <aas:identification idType="URI">smart.festo.com/demo/aas/1/1/454576463545648365874</aas:identification>

New XML:

<environment xmlns="https://admin-shell.io/aas/3/0">
  <assetAdministrationShells>
    <assetAdministrationShell>
      <idShort>Festo_3S7PM0CP4BD</idShort>
      <id>smart.festo.com/demo/aas/1/1/454576463545648365874</id>

aasenv has changed to environment.
identification has changed to id and has lost the attribute idType.

So no, we can't do this. Package Explorer can open AASX files of version 1 and will save as version 3 through File/Save.