Add retries to bfpxe wget for bfks (#126)
Add retries to bfpxe wget for bfks (#126)

If a network is slow to come online the wget for grabbing a bfks file
will silently fail and fall back to using the default install.sh. This
commit adds a few retries with a sleep between. If the wget succeeds,
the loop completes and moves on.

Co-authored-by: Michael Basnight <180923fa42bdd6f2d234322b27c91f18387134d1@nvidia.com>

Co-authored-by: Michael Basnight <180923fa42bdd6f2d234322b27c91f18387134d1@nvidia.com>
Mellanox/bfscripts,Mellanox/bfscripts