Webhooks implementation

[lunny]

This is a summary issue for all the requirement related with webhooks

• Push, PR open/close/reopen/edited/assigned/unassigned/label updated/label cleared/synchronized, Branch/Tag created
• Webhooks for repo creation/deletion PR(Webhooks for repo creation/deletion #1663)
• Webhooks for issues Issue(Webhooks for issues #132) PR(Add more webhooks support and refactor webhook templates directory #3929 )
• Pull request webhook should support all PR-related events Issue(Pull request webhook should support all PR-related events #895)
• PUSH event hooks not sent for branch removal Issue(PUSH event hooks not sent for branch removal #2105)
• Webhook delivery test unavailable for organisations Issue(Webhook delivery test unavailable for organisations #2219)

[lcges]

@lunny How is progress on this task?

[lunny]

@qdbdbp I have updated the issue content. Did this answered your question?

[lcges]

ok.
Do you think all webhooks are coming in to release 1.3?

[lunny]

I wish that.

[daviian]

@lunny PUSH event hooks not sent for branch removal Issue #2105 is done

[lunny]

@daviian done.

[hellasteph]

Does this issue accept bounty? I would like to support for someone to complete this. ;)

[lunny]

@hellasteph This is a summary issue, so I think no one people will work on all these issues. It's not suitable for bounty I think.

[hellasteph]

Thanks for clarification, @lunny. I’ll read through your summary and find the issue that best fits what I was hoping to have happen. Thank you!

[Ceda-EI]

The PR (#908) regarding Issue webhooks has been closed. What is the status on that now?

[lunny]

@thehowl

[thehowl]

Needs to be re-made on the current codebase (& reviewed and merged). It's sort of dangling in my head, I may get around to it eventually, but the code is roughly the one of my PR, although it definitely needs to be changed to suit the way webhook code is currently written.

[lunny]

[lunny]

Only #2219 left on this issue and I removed it since it's not a blocking issue.