slaprunner: listener added to supervisor. It writes the files used by /slapgridResult (*_info.json)
slaprunner: inet address for controlling supervisord transmitted via slapos.cfg
slaprunner: only one url to manage git repositories
slaprunner: updated info for git (parameters and readme)
slaprunner: do not use localhost ip for instance-dependant servers
slaprunner: fix python dependencies for supervisord's listener
slaprunner: supervisor handles better log files
slaprunner: correctly writes slapgrid result after build&run
slaprunner: listener execution is depending on which process ended

Do not try to write *_info.json files every time a process stops