This send SIGTERM instead of SIGKILL to the promise. This allow the
promise to catch te signal and do some clean up before exiting.

Conflicts:
	slapos/grid/slapgrid.py

This reverts commit 0dedf0a5.
Vifib skin folder ordering has to be cleanly defined (priority=60 like for the
other skin folders).

There is no need to show SoftwareInstance_view.

Reorder the business template list on BusinessConfiguration_setupVifibStandardBT5 to match with vifib tests.

This reverts commit ba0006c9.

Additionaly convert all to JSON.

 * explain all common errors once
 * drop extension, as content type is good enough
 * make requests looking like real HTTP requests, define required headers
 * explain inline possible values

(Removing trailing space at the same time).

Avoid having two same gid.