[Insight] Feature pull enabled on insight01.dev

[Paul W. Frields]

I got the puppet repo updated so that insight01.dev now pulls the
'devel' branch HEAD of the 'fedora-insight-features' repo for
insight01.dev. Once we're sure that's working well and we have our
process well in hand, I can easily expand the function to the staging
and production hosts. I set it up so that these can be easily enabled
in the mainfests/nodes/ entries for each of those hosts.