TPS-738 [5.5.1]xsd:duration type doesn't work(TMDM-7768)

TMDM-7768: "xsd:duration type doesn't work"

Maps xsd:duration to java.lang.String (in turn mapped to varchar in database).
Updates unit test accordingly.
(https://jira.talendforge.org/browse/TMDM-7768)
(cherry picked from commit 87d4583)