Comment out flakey test_idle

This often fails, it's the one with "zong" in the log output.
It's worth keeping for when channel cleanup code needs future
modification.

pytest "mark" could be used to properly make it non-default, but this
is good enough for now.

Author: mkj

test/test_channels.py

@@ -68,7 +68,10 @@ def test_bg_sleep(request, fd, dropbear):
 		assert st.rstrip() == "hello"
 
 
-def test_idle(request, dropbear):
+# This test is flakey so disabled.
+# If working on channel close code it can be manually run
+# by renaming to test_idle().
+def flakey_test_idle(request, dropbear):
 	# Idle test, -I 1 should make it return before the 5 second timeout
 	r = dbclient(request, "-I", "1", "echo zong; sleep 10",
 		capture_output=True, timeout=5, text=True)