feat: add support for raw secret values

Load the secret value from the RawValue field, if it is empty, use the
string value. Add unit tests for the creation handler.

Refactor secret parser tests.

Resolves openfaas#208

Signed-off-by: Lucas Roesler <roesler.lucas@gmail.com>

Update messages to want/got for unit tests

This is the style used in the openfaas project.

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

Fix for openfaas#201

Old secrets are now copied, rather than moved, so that any
existing functions do not need to be redeployed by the user.

As a maintenance task, users should remove the older secrets.

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

Add pacman to the install script

The install.sh script was modified to include a test for the pacman package manager, and to use it should it be present.
This is necessary for the script to work on Arch based Linux distributions, or more generally ones that use pacman as their main package manager.
It was tested by simply trying it out on two local machines, one running Manjaro, one running Arch. In both cases it worked as expected, and without error.

Signed-off-by: Jacob Palecek <jacob.palecek@outlook.com>

Update to containerd v1.5.4

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

Upgrade to NATS v0.22.0

Upgrades NATS and the queue-worker and the gateway to
compatible versions

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

Update to newer faas-provider

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

Update to newer faas-provider

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

Upgrade to faas-provider 0.17.1

**What**
Update faas-provider to get the proxy implementation that allows CORS
requests (OPTIONS) and HEAD.

Signed-off-by: Lucas Roesler <roesler.lucas@gmail.com>

Update proxy from provider

When endpoints are not found, a 503 is returned instead of a
404.

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