af-main: Remove afm-user-daemon and bump version

af-main: Remove afm-user-daemon and bump version

The process afm-user-daemon is no more used within AGL.
So it is better to remove its installation.

Integrates the following changes:
  * d0d4dcd Allow setting of libexec location
  * 2db5d23 Fix outdated application path.
  * cc93752 Refactor of system and user setup
  * 316b19f Remove unused definitions
  * 401188a Use definition of afm_prefix
  * efabde7 afm-unit conf: Remove useless tests
  * 405ba31 afm-user-session: moves in libexec directory
  * 07a9590 afm-unit: Simplify the Makefile
  * 44b1bdc afm-unit.conf: cleanup of generation
  * 2f3486b gitignore: Add ignore of EXTERNALSRC's artifacts
  * 5b801a3 afm-unit.conf: Refactor its generation
  * ce5c20d afm-user-daemon: Remove it by default

Bug-AGL: SPEC-2006
Bug-AGL: SPEC-2360
Bug-AGL: SPEC-2367
Bug-AGL: SPEC-2436
Bug-AGL: SPEC-2437

Change-Id: Ib77ecc2e9aabb8a3c5cef7266c3f5b19205939b9
Signed-off-by: José Bollo <jose.bollo@iot.bzh>