Fix comment in show_cluster_all.py.
Fix comment in show_cluster_all.py.

This (small) change fixes a comment.

Change-Id: Idf451eca9848726871e13665ad85ece58a7380c2
Reviewed-by: Gabor Gombas <3bb8c49439d9d044594e1c6967f991d0b4248a64@morganstanley.com>

quattor/aquilon,quattor/aquilon,quattor/aquilon