Description of problem:
POST, PUT and DELETE calls fail with "Unable to authenticate user" when using kerberos authentication. At the same time, GET calls pass without any issues.


Version-Release number of selected component (if applicable):
6.12.0 snap 8


How reproducible:
always


Steps to Reproduce:
1. Have a Satellite configured for Kerberos authentication.
2. Run kinit <someuser> to get ticket.
3. Call /extlogin to get session_id and store it in a cookie file:
# curl -k -c cookies.txt -u : --negotiate https://satellite.redhat.com/users/extlogin
4. Using the cookie file try GET call to some endpoint, it works:
# curl -b cookies.txt -H "Accept:application/json,version=2" -H "Content-Type:application/json" -X GET -k https://satellite.redhat.com/api/architectures
5. Using the same cookie file try POST/PUT/DELETE call to create/update/delete an entity:
# curl -b cookies.txt -H "Accept:application/json,version=2" -H "Content-Type:application/json" -X POST -d '{"name":"8051"}' -k https://satellite.redhat.com/api/architectures


Actual results:

It fails with this response:
{
  "error": {"message":"Unable to authenticate user "}
}

In the production log we can see:
2022-08-30T04:38:23 [I|app|0dd98e4b] Started POST "/api/architectures" for 10.11.12.13 at 2022-08-30 04:38:23 -0400
2022-08-30T04:38:23 [I|app|0dd98e4b] Processing by Api::V2::ArchitecturesController#create as JSON
2022-08-30T04:38:23 [I|app|0dd98e4b]   Parameters: {"name"=>"8051", "apiv"=>"v2", "architecture"=>{"name"=>"8051"}}
2022-08-30T04:38:23 [W|app|0dd98e4b] Can't verify CSRF token authenticity.
2022-08-30T04:38:23 [I|app|0dd98e4b]   Rendering api/v2/errors/unauthorized.json.rabl within api/v2/layouts/error_layout
2022-08-30T04:38:23 [I|app|0dd98e4b]   Rendered api/v2/errors/unauthorized.json.rabl within api/v2/layouts/error_layout (Duration: 6.9ms | Allocations: 6931)
2022-08-30T04:38:23 [I|app|0dd98e4b] Filter chain halted as :authorize rendered or redirected
2022-08-30T04:38:23 [I|app|0dd98e4b] Completed 401 Unauthorized in 14ms (Views: 11.1ms | ActiveRecord: 0.5ms | Allocations: 13914)


Expected results:
Successful authentication, entity created/updated/deleted


Additional info:
This issue impacts the hammer CLI functionality too.