Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

The response for an image tag that has not been found is inside a JSON elemnt of "message" not the stated "details", it has also been lower-cased.

Signed-off-by: Alistair Hey <alistair.hey@gmail.com>

Automatic builds for auth-module on x86_64 (via Travis) and on-demand on-device for arm via publish.sh

The basic-auth module is not built or pushed upon 'tag' / 'release' of the faas repo, but it should be: https://github.com/openfaas/faas/tree/master/auth.  We also don't create on-device images for this, but should do for both armhf and arm64: https://github.com/openfaas/faas/blob/master/contrib/publish-arm.sh



This change addresses these challenges and also introduces a tagAndPush script to alleviate some of the recently introduced repetition in .travis.yml.

Signed-off-by: Richard Gee <richard@technologee.co.uk>

Signed-off-by: Radoslav Dimitrov <dimitrovr@vmware.com>

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

The publish script is now common for both ARMHF and ARM64

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

Proceed with building the image only if it's not already available.

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>