Content type pds4+xml does not namespace tags in <pds_api:meta> with pds_api

[al-niessner]

🐛 Describe the bug

The desire is to have pds_api namespace prefix all of the tags within meta instead of how it is:

  <pds_api:meta>
    <node_name>PSA</pds_api:node_name>
    <label_file>
      <file_name>ns_inst.xml</pds_api:file_name>
      <file_ref>/var/local/harvest/archive/document/ns_inst.xml</pds_api:file_ref>
      <creation_date>2022-01-24T20:08:23Z</pds_api:creation_date>
      <file_size>3589</pds_api:file_size>
      <md5_checksum>a8d09cca0a01728db50c15052c2736cf</pds_api:md5_checksum>
    </label_file>
    <data_files>
      <data_files>
        <file_name>ns_inst.pdf</pds_api:file_name>
        <file_ref>/var/local/harvest/archive/document/ns_inst.pdf</pds_api:file_ref>
        <creation_date>2022-01-24T20:08:23Z</pds_api:creation_date>
        <file_size>138172</pds_api:file_size>
        <md5_checksum>8103f20c13a3c321dac4a193aba19d16</pds_api:md5_checksum>
        <mime_type>application/pdf</pds_api:mime_type>
      </data_files>
    </data_files>
  </pds_api:meta>

📜 To Reproduce

Steps to reproduce the behavior:
$ curl --location --request GET 'http://localhost:8080/products/urn:nasa:pds:izenberg_pdart14_meap:document:ns_inst::1.0' --header 'Accept: application/pds4+xml' | xmllint --format -

🕵️ Expected behavior

  <pds_api:meta>
    <pds_api:node_name>PSA</pds_api:node_name>
    <pds_api:label_file>
      <pds_api:file_name>ns_inst.xml</pds_api:file_name>
      <pds_api:file_ref>/var/local/harvest/archive/document/ns_inst.xml</pds_api:file_ref>
      <pds_api:creation_date>2022-01-24T20:08:23Z</pds_api:creation_date>
      <pds_api:file_size>3589</pds_api:file_size>
      <pds_api:md5_checksum>a8d09cca0a01728db50c15052c2736cf</pds_api:md5_checksum>
    </pds_api:label_file>
    <pds_api:data_files>
      <pds_api:data_files>
        <pds_api:file_name>ns_inst.pdf</pds_api:file_name>
        <pds_api:file_ref>/var/local/harvest/archive/document/ns_inst.pdf</pds_api:file_ref>
        <pds_api:creation_date>2022-01-24T20:08:23Z</pds_api:creation_date>
        <pds_api:file_size>138172</pds_api:file_size>
        <pds_api:md5_checksum>8103f20c13a3c321dac4a193aba19d16</pds_api:md5_checksum>
        <pds_api:mime_type>application/pdf</pds_api:mime_type>
      </pds_api:data_files>
    </pds_api:data_files>
  </pds_api:meta>

---

🦄 Related requirements

⚙️ Engineering Details