[pkg] Inline call to setup() in setup.py
The point of having this "install" function, called in "main" mode is not
clear. Better stick to standard practices.
if versions_map['cubicweb'][0] == (3, 7, 4):
config['http-session-time'] *= 60
config['cleanup-session-time'] *= 60
config['cleanup-anonymous-session-time'] *= 60