sessions are marked as closed even when they are open

[jle64]

What happened:
When doing a session ls, sessions are all shown as closed, even those that are currently open.

What you expected to happen:
Open session sshould be marked as open.

How to reproduce it (as minimally and precisely as possible):
Open a session to a host and in parallel do a session ls on the sshportal cli. The session will be seen as closed even though it is open

[moul]

fixed by #75