Fix grid setup
When following the setup steps as described in the docs for running grid dumps, we can run into the situation where the voms-proxy isn't set up, and the command 'voms-proxy-init' isn't available.
This MR modified the grid setup script to check if 'voms-proxy-init' is present. If not, then we run lsetup emi
to give access.
Thanks @dguest
Edited by Nikita Ivvan Pond