GDA-6038 Replace calls to getattr(String name, Object data, int args[]) 

with getattr(String name).
libjnexus reports error due to check napi5.c:NX5getattr that the 
rank of the data is 0. In the error case the rank is 1.

The check on the rank has been added in commit 47392853 by Tobias.
GDA-6038 String attributes are now read as String []
GDA-6038 Reduce dimension by 1 when reading  NX_CHAR data
GDA-6038 Handle NexusGroupData containing string[]
jenkins build 2014-09-02_13-39-15

see http://jenkins.diamond.ac.uk:8080/job/nexus_update_gda_plugin/18/

Fixes underlying regression detected in GDA-6038
As far as GDA is concerned that problem has been fixed by moving to
the new NeXus attribute array API already.
Merge branch 'gda-8.42'