Added validator at models 'Group' class to have only unique groupname
Added validator at models 'Group' class to have only unique groupname

AvadootNachankar/gstudio,supriyasawant/gstudio,AvadootNachankar/gstudio,Dhiru/gstudio,makfire/gstudio,Dhiru/gstudio,Dhiru/gstudio,supriyasawant/gstudio,makfire/gstudio,AvadootNachankar/gstudio,gnowledge/gstudio,gnowledge/gstudio,gnowledge/gstudio,AvadootNachankar/gstudio,gnowledge/gstudio,Dhiru/gstudio,olympian94/gstudio,gnowledge/gstudio,olympian94/gstudio,makfire/gstudio,makfire/gstudio,supriyasawant/gstudio,supriyasawant/gstudio,olympian94/gstudio,olympian94/gstudio,olympian94/gstudio,olympian94/gstudio