Fixes session timeout string in horizon

1) This patch fixes the session timeout string problem which
occurs when users clicks on the UI and Ui redirects the
user to the login page but without session timeout message.

2) This patch also fixes other cases of unnecessary logout
messages.

Closes-Bug: #1231355

Change-Id: I9824db44382247d64cc8c399eb5e855e818e8781
Fix E127 errors in horizon/

E127 continuation line over-indented for visual indent

Partial-Bug: #1375931
Change-Id: Ib9ae85a767a85a360e5a720d8392a20069a8c873
Merge "Fixes session timeout string in horizon"
Merge "Fix E127 errors in horizon/"