Enable the usage of the "+" character when creating new users, workflows support it just fine.

OLD DESCRIPTION:

It's a valid character for email addresses, but it causes the create organization workflow to fail in an inconsistent state.

The detailed explanation is here:
https://tracker.mender.io/browse/MEN-1918?focusedCommentId=89328&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-89328

To reiterate:

• conductor uses the email verbatim in url calls, as a query string param

  • http://mender-tenantadm:8080/api/internal/v1/tenantadm/tenants?username=foo+bar@baz.com

• go incorrectly interprets the '+' as space - the tenant is not found and it's a silent failure

The solution would be to:

• add an extra email-urlencoded field to the create_organization workflow (and to tenantadm's conductor client)

• propagate this field via the organization_created event to interested event listeners

  • these are mostly saas-specific workflows: create_artifacts, create_tenant_demo_device

• use the urlencoded version where necessary

• allow existing workers and services use the existing email where encoding doesn't matter

This is a placeholder task, if we intend to take it it has to be broken down like a mini-epic.

We're deprioritizing this for now because of the scope of required changes/effort.