Bug: Fix code insecure issue that binds a socket to all network interfaces (#291)

**Description**
Fix code insecure issue that binds a socket to all network interfaces.

superbench/common/utils/network.py

@@ -16,7 +16,7 @@ def get_free_port():
     """
     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     try:
-        s.bind(('', 0))
+        s.bind(('127.0.0.1', 0))
         s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         return s.getsockname()[1]
     except OSError: