[ovs-git] [ovn-org/ovn] 11fb40: test: Fix options:requested-chassis with hostname

[Frode Nordahl]

  Branch: refs/heads/branch-21.09
  Home:   https://github.com/ovn-org/ovn
  Commit: 11fb404e06c63f0bbc7e871302c1f577c8063a91
      https://github.com/ovn-org/ovn/commit/11fb404e06c63f0bbc7e871302c1f577c8063a91
  Author: Frode Nordahl <frode.nordahl at canonical.com>
  Date:   2021-10-04 (Mon, 04 Oct 2021)

  Changed paths:
    M tests/ovn.at

  Log Message:
  -----------
  test: Fix options:requested-chassis with hostname

This test currently passes, but is broken in two ways.

1) The `fetch_column` helper should be used to retrieve the value
   of hostname, not `fetch` wich results in a "fetch: command not
   found" error which is currently not caught by the test.  As a
   consequence the requested-chassis option was set to the empty
   string ("") and not the chassis hostname.

2) When we introduced testing with TLS+RBAC in c948d6bb05b4 the
   ovn_az_attach helper was updated to set the hostname to match
   system-id.  This of course also makes the name and hostname
   columns in the Chassis record contain the same value which made
   this test no longer do what it says on the tin.

Update test to explicitly set the value to be used for
requested-chassis option in the Chassis hostname record, and
add a check for it not being empty nor equal to chassis name.

Fixes: 4afe409e95c7 ("tests: Introduce new testing helpers.")
Fixes: c948d6bb05b4 ("tests: Test with SSL and RBAC for controller by default")
Signed-off-by: Frode Nordahl <frode.nordahl at canonical.com>
Signed-off-by: Numan Siddique <numans at ovn.org>
(cherry picked from commit 9dadbd482cc09b86a81e72887f8ce7849f70b2af)