hydra-module: Set GIT_SSL_CAINFO for git over https

Dependencies

• [2] ZYEFL36Q Ported/merged properties from the TUD configuration's hydra-module
• [*] D3MDJONY

Change contents

• edit in hydra-module.nix at line 25
  [2.267]

  [2.267]
  + GIT_SSL_CAINFO = "/etc/ssl/certs/ca-bundle.crt";