fw-tools/edge-testnet - add || true to google ping

[JanneKiiskila]

It can fail and if it does that, the script execution will stop abruptly (which is not what we want).

Todos

• Changelog updated
• Run shellcheck or pysh-check before committing code - no more warnings than earlier (preferably less)
• Will tag a proper release, if need be.
• Will update required recipes/builds as well.
  • Update pe-utils 2.3.7 meta-edge#38
  • Update pe-utils to 2.3.7 snap-pelion-edge#438
• Will update also the versions to relevant places:
  • edge-info/edge-info has the version number (around line 37)
  • identity-tools/VERSION has the version number as well.