Beginning setup of new release testing.

release_tests/support/__init__.py

@@ -0,0 +1,14 @@
+"""Common support items for rekease teesting."""
+
+from socket import socket
+
+ADDR = "127.56.0.1"
+
+
+def get_port():
+    """Retrieve an unused port."""
+    sock = socket()
+    sock.bind((ADDR, 0))
+    port = sock.getsockname()[1]
+    sock.close()
+    return port