Fix agents status fetching when SOAP API returns single agent
Fix agents status fetching when SOAP API returns single agent

By default Savon doesn't create an array when XML tree has only one
child.

UniversityofHelsinki/OC-webgui,UniversityofHelsinki/OC-webgui,UniversityofHelsinki/OC-webgui,UniversityofHelsinki/OC-webgui