Fix ESI CLI api version error

[tzumainn]

If you use the ESI CLI, then you'll likely get this error the first time you run it:

No API version was specified or the requested operation was not
supported by the client's negotiated API version 1.86. Supported
version range is: 1.1 to 1.72

Running export OS_BAREMETAL_API_VERSION=1.69 resolves this issue; however this is non-ideal, and notably the Ironic CLI commands (such as openstack baremetal node list) doesn't run into this problem.