Fix for 'force autoscan' routine (IPAddress needs to be re-fetched since
'autoscan_address' can update some of its fields).

Fix for 'ssh_juniper' plugin (when there's at least 'snmp_name' or
'http_family' it should proceed further instead of exiting).
Merge pull request #1027 from xor-xor/raph_1845

Fixes for 'force autoscan' routine and for 'ssh_juniper' plugin.