vtk_groupname
Usage:         
vtk_groupname 
Description:   
Get the name of the current UNIX operating system group. 
Example: 
vtk_groupname integration
Returns:       
A string
Usage:         
vtk_groupname 
Description:   
Get the name of the current UNIX operating system group. 
Example: 
vtk_groupname integration
Returns:       
A string