af-binder: Upgrade to binding v3

af-binder: Upgrade to binding v3

And also upgrade af-main to use new feature.

This new version brings the the following features:

 * Dynamic api
 * Event handler
 * Automatic bounding to unknown api
 * Improvement of subcalls
 * Improvement of supervision

Bindings v2 are still supported but are
deprecated and will be removed in some future.

CAUTION: Bindings v1 and vdyn are removed.

Bug-AGL: SPEC-1511
Bug-AGL: SPEC-1020
Bug-AGL: SPEC-1485
Bug-AGL: SPEC-1400
Bug-AGL: SPEC-1126

Change-Id: I0ecc513601cfc7f571f2a3ff90095496b32491d3
Signed-off-by: José Bollo <jose.bollo@iot.bzh>