Expand Default value of attributes to further components of the Jedox plattform

The functionality to set Default values for dimension element attributes (currently available in the Modeler) should be also available

a) when uploading a dimension from a file with the Modeler,

b) when loading a dimension with Integrator,

c) when creating dimension elements with a PALO formula in a spreadsheet,

d) when using other/ future user interfaces.

This could be achieved by implementing this functionality on database level (in the OLAP database).