azuredevops_group create may fail due to AAD replication issues/delay

[tiwood]

We should add a retry function to the azuredevops_group resource.

Request

:authority: vssps.dev.azure.com
:method: POST
:path: /xxx/_apis/Graph/Groups
:scheme: https
x-tfs-fedauthredirect: Suppress
x-tfs-session: 39c99ad2-ce33-40a7-8771-6b77990c6cba
user-agent: go/go1.13.6 (darwin amd64) azure-devops-go-api/0.0.0
authorization: Basic xxx
accept: application/json;api-version=5.1-preview.1
content-type: application/json;charset=utf-8
content-length: 51
accept-encoding: gzip

{"originId":"edbb7079-7cdb-4f63-89b7-a599e827dcc5"}

Response/Returned error:

:status: 400
cache-control: no-cache
pragma: no-cache
content-length: 204
content-type: application/json; charset=utf-8; api-version=5.1-preview.1
expires: -1
<snip>

{"count":180,"value":"VS860016: Could not find subject 'edbb7079-7cdb-4f63-89b7-a599e827dcc5' in the backing domain. This value came from the parameter 'originId'. Please check your input and try again."}

Blocked-by

blocked by microsoft/azure-devops-go-api#48

[tmeckel]

Files a PR at the Azure DevOps GO API which utilizes the HashiCorp retryable HTTP client as transport backend for the DevOps API

microsoft/azure-devops-go-api#49