Test: scheduler: add regression test for remote connection shutdown
    
    In particular, a remote node is shutting down, and its node history comes
    before a cluster node's history in the status section, where that cluster node
    has a probe that found the remote node's connection not running in its history.
    
    The test ensures that the connection is scheduled to be stopped, even though
    that later history will set the next role to unknown.
    
    patch_name: 032-rhbz1898457.patch
    present_in_specfile: true
    location_in_specfile: 32
    squash_commits: true