Fix help message for `ip floating delete`

Previously, the help message incorrectly had the
string "IP address to add to server". This should
probably read "IP address to delete".

Change-Id: If592b736448199f84c30e0cbc8110a0a76e2c140
Closes-Bug: #1316877
Display all server log when --lines option is None

Without --lines option, `console log show xxx`
cmd will break.

Change-Id: I4027aacac245e6916c1808fd9f878fb708c8a5f0
Closes-Bug: #1316870
Merge "Fix help message for `ip floating delete`"