Fix permission label and write verbs call

Fix permission label and write verbs call

- Fails write request if CAN signal not writable
- Fix permission label
- Correctly reconstituting entire CAN frame
- Deprecate cmake variables not useful
    Mechanism to build 3rdparty external libs isn't unique
    and should not be handled by app-templates
- Handle space in project path

Bug-AGL: SPEC-966

Change-Id: I3cf2cef32b55b2f796c154ff88aa23fdf1644a7d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/12231
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>