Bug 1694263: improve debug msg to match pstack threadId
    
    Description:
    
    	A pstack is showing threadId that differs from the
    	the thread pointer. To match logs with pstack
    	better to display the threadId
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1694263
    Signed-off-by: Thierry Bordaz <tbordaz@redhat.com>