Updated Elsevier author name handling (#91)

* Delete tests/stubdata/output/Copernicus_ESSD_essd-15-3075-2023.json

* Delete tests/stubdata/output/Copernicus_GeChr_gchron-5-323-2023.json

* Delete tests/stubdata/output/Copernicus_ISPAn_isprs-annals-X-M-1-2023-237-2023.json

* Delete tests/stubdata/output/Copernicus_ISPAr_isprs-archives-XLVIII-M-2-2023-721-2023.json

* Delete tests/stubdata/input/Copernicus_ESSD_essd-15-3075-2023.xml

* Delete tests/stubdata/input/Copernicus_GeChr_gchron-5-323-2023.xml

* Delete tests/stubdata/input/Copernicus_ISPAn_isprs-annals-X-M-1-2023-237-2023.xml

* Delete tests/stubdata/input/Copernicus_ISPAr_isprs-archives-XLVIII-M-2-2023-721-2023.xml

* updated elsevier author name handling

---------

Co-authored-by: Mugdha Polimera <mugdhapolimera@saos-MacBook-Pro.local>

adsingestp/parsers/elsevier.py

@@ -262,9 +262,13 @@ def _parse_authors(self):
             authors_raw = self.record_meta.find("ce:author-group").find_all("ce:author")
             for author in authors_raw:
                 author_tmp = {}
-                if author.find("ce:given-name") and author.find("ce:surname"):
-                    author_tmp["given"] = author.find("ce:given-name").get_text()
+                if author.find("ce:surname"):
+                    if author.find("ce:given-name"):
+                        author_tmp["given"] = author.find("ce:given-name").get_text()
                     author_tmp["surname"] = author.find("ce:surname").get_text()
+                elif author.find("ce:given-name") and not author.find("ce:surname"):
+                    # In case given-name is present, but no surname is available, put the given name in the surname
+                    author_tmp["surname"] = author.find("ce:given-name")
 
                 author_tmp["orcid"] = author.get("orcid", "")