Is this issue been solved in jclouds 1.7.0?
No, there has been no additional work on vCloud 5.1 in 1.7.0. See two recent user group threads on this topic [1, 2].
Is this something to which you might be able to contribute..? ap [1] http://markmail.org/thread/fnvzm3rc65or65c6 [2] http://markmail.org/thread/guszu6nunslmdwii
