Install python{,3}-dev packages on stat1

Aaron Halfaker asked for python3-dev in order to be able to compile
oursql python package on his local environment. python-dev for python2.7
was already installed but not puppetized. This commit installs both
packages through puppet.

Change-Id: I9f586f2fc0c9184139a5c91e46c24eb1babefb5a