VOLTHA tools and installers (consolidate, centrally supported for upgrades)

Several tools voltha repos are dependent on use different installation methods, install different versions, etc.  All of this should be consolidated and centrally maintained.

Tools (known): kail, kind, voltctl, bbsim

Installers:

• inlined curl commands, some hardcoded versions.
• scripting: docker,groovy, jenkinsfile, shell
• godownloader.sh
  • kail installer
    • https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/commands/kail.mk
  • godownloader.sh has been deprecated.
  • we captured a copy of the scirpt to work around deprecation breakage.
  • Deploy a reliable answer.

Todo (for individual tools):

• Locate all copies of installers and versions installed across all repositories.
• Refactor into a central installer:
  • Installer is wrapped in a makefile target.
  • Command maintained as a dependency, only retrieved when needed.
  • Current answer:  kind installer
    • make install-command-kind
    • https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/commands/kind.mk
• Installer logic should:
  • Support versioning:
    • make install-command-kail kind-cmd-ver=v0.21.
    • For now download and install the latest version available.
    • Long term we should revisit this.  Always using latest available contributes to unplanned breakage.  Agree on a release cycle, freeze version in use and every few weeks/once a month plan on performing a mini-release where the latest tool is deployed for all repos to consume.
  • Support dependencies
    • Do not blindly download and install commands every time when a versioned binary was retrieved previously.
• Document setup and tool use
  • https://docs.voltha.org