used self.port in bind, instead of the hardcoded 0

[yliaog]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

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Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[kubernetes-prow]

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[yliaog]

self = <DummyProxy(Thread-51, initial daemon)>, host = '127.0.0.1', port = 8888

def __init__(self, host='127.0.0.1', port=8888):
    super().__init__(daemon=True)
    self.host = host
    self.port = port
    self.received_connect = False
    self._server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    self._server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

  self._server_sock.bind((self.host, self.port))

E OSError: [Errno 98] Address already in use

[yliaog]

ok, should keep using port 0 to avoid "E OSError: [Errno 98] Address already in use"

[yliaog]

/close

[kubernetes-prow]

@yliaog: Closed this PR.

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/close

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