In case of erp5testnode, we have only one IP. So slapos node instance on clone instance would reach... slapproxy of main slaprunner.

Let the supervisord of slaprunner managing the instance processes
be managed by supervisord of slapos node.

Fixes problems of process like supervisord escaping control.

Also remove unused variable in nginx-conf.

+ make promise checking this

  Missing update on parts, slapos-repo needs to be explicitly invoked.

Supervisord will replace Popen instructions

Conflicts:
	software/slaprunner/instance-runner.cfg

Nginx is set in front of cloud9 running in local with https to secure its access