Missing ability to pass vshardGroupName

[Marcell Baán]

Hi there,

I would like to change the vshardGroupName in my configuration, but currently the chart doesn't support to pass the parameter.

helm-charts/charts/cartridge/templates/roles.yaml

Lines 25 to 27 in 92cf0ef

 vshard: 
   weight: {{ .vshard.weight | int }} 
   clusterRoles: {{ .vshard.roles | toYaml | nindent 4 }} 

Can you please make it configurable?

Thank you!

[Marcell Baán]

I raised a PR for it when you have time please look into it. Thank you!
#15