Update other platform Dockerfiles

Signed-off-by: Alex Ellis <[email protected]>

Rename config WatchdogPort to RuntimeHTTPPort

Signed-off-by: stefanprodan <[email protected]>

Document local development

**What**
- Update readme to point to the contribution docs, to make it more
discoverable to new developers.
- Add start and stop commands to the Makefile to streamline the
essential steps for daily development.  The start command will print the
UI url and cli login command to make it easier to start using and
testing the envionment, including showing the username and the generated
password.
- Add additional `kubectl rollout` commands to really ensure that
everything is started, the initial scripts did not always wait in the
expected way and would fail to install openfaas.
- Document how to use the new makefile commands, how to load a docker
image into the environmnet, and how to restart the port-forwarding.
- Update the contrib bash scripts to use a portable shebang, this should
ensure better compatibility between different developer machines.

Signed-off-by: Lucas Roesler <[email protected]>

Vendor the 0.9.0 faas-provider version

Vendoring the change which renames Health to HealthHandler to
faas-netes for the healthz endpoint

Signed-off-by: Martin Dekov <[email protected]>

Add new owners

Add unit test for makeProbes

Added exec and httpProbe test-cases.

Signed-off-by: Alex Ellis <[email protected]>

Implement serviceAccount for functions

This change adds custom serviceAccount support for faas-netes
as per the equivalent change in the Operator:

openfaas/openfaas-operator#77

The deploy and update handlers are updated to read and
set the serviceAccountName from the annotation:
"com.openfaas.serviceaccount". When the annotation is empty
then the default service account is set when the podSpec
is updated.

Signed-off-by: Alex Ellis <[email protected]>

Updates based on PR feedback:

- move logging back to caller
- return both http status code and k8s reason
- add tests for default and conflict reasons

Signed-off-by: Andrew Cornies <[email protected]>

Refactor secrets handler logic into sub-handlers

**What**
- Create independent handler methods for each support http method

Signed-off-by: Lucas Roesler <[email protected]>

Bump golang to 1.10.x and alpine to 3.8

**What**
- Bump the base docker image to golang:1.10
- Bump the alpine version to 3.8

Signed-off-by: Lucas Roesler <[email protected]>