Use credential bindings for osrfbuild github token

[j-rivero]

The PR removes the action of taking the GITHUB_TOKEN from the filesystem and implements the credentials plugin from Jenkins on it. There is also a testing job generated that check permission and push capabilities running directly on osX nodes:

Linked to: https://github.com/osrf/chef-osrf/pull/55

[j-rivero]

@scpeters this should allow us to move brew jobs out of master and remove the osrfbuild key and use the token instead.

[j-rivero]

Now that releasing has calm down, I'm interested into merging this one.

[scpeters]

testing: https://build.osrfoundation.org/job/_dsl_brew_release/608/

[scpeters]

testing: https://build.osrfoundation.org/job/_dsl_brew_release/608/

testing more here: osrf/homebrew-simulation#1269 (comment)

[scpeters]

testing: https://build.osrfoundation.org/job/_dsl_brew_release/608/

testing more here: osrf/homebrew-simulation#1269 (comment)

this branch is out of date; I just merged with master and will redeploy the DSL:

• https://build.osrfoundation.org/job/_dsl_brew_release/609/
• [DONTMERGE] ignition-plugin0: revision bump osrf/homebrew-simulation#1269 (comment)
• https://build.osrfoundation.org/job/generic-release-homebrew_triggered_bottle_builder/614/

[scpeters]

the bottle builder currently fails during hub pr checkout step:

https://build.osrfoundation.org/job/generic-release-homebrew_triggered_bottle_builder/614/label=osx_catalina/

+ hub pr checkout 1269
github.com username: github.com password for  (never stored): Not Found

[scpeters]

testing the opening of a homebrew PR from release.py:

• https://build.osrfoundation.org/job/generic-release-homebrew_pull_request_updater/1000/

it fails because this job actually expects a Linux machine

++ BREW_PREFIX=/home/linuxbrew/.linuxbrew
++ BREW=/home/linuxbrew/.linuxbrew/bin/brew
++ /home/linuxbrew/.linuxbrew/bin/brew up
./scripts/jenkins-scripts/lib/_homebrew_github_setup.bash: line 22: /home/linuxbrew/.linuxbrew/bin/brew: No such file or directory

we should update the script to use BREW_PREFIX=/usr/local for macOS

[scpeters]

I've redeployed the brew dsl from master in order to build some bottles

• https://build.osrfoundation.org/job/_dsl_brew_release/610/

[j-rivero]

Resurrecting this:

Looking into the errors that appeared in the previous testing deployed:

• hub pr checkout 1269
  github.com username: github.com password for (never stored): Not Found

Somehow the GITHUB_TOKEN setup seems not to work with hub. We probably need to add a testing of hub to the test file to be sure everything is working.

it fails because this job actually expects a Linux machine
++ BREW_PREFIX=/home/linuxbrew/.linuxbrew
++ BREW=/home/linuxbrew/.linuxbrew/bin/brew
++ /home/linuxbrew/.linuxbrew/bin/brew up
./scripts/jenkins-scripts/lib/_homebrew_github_setup.bash: line 22: /home/linuxbrew/.linuxbrew/bin/brew: No such file or directory

This clearly fails because our scripts were prepared to use master (a linux box) to interact with Brew via LinuxBrew. I'm going to revert the change to use master in this first step before we move runs out of it in a second PR.