Fix faulty iallocator type check
Fix faulty iallocator type check

Because the ignore-soft-errors parameter is optional rather than always
present, fix the type check in the iallocator request issuing code.

Signed-off-by: Gerard Oskamp <079384a3e33710c9676841a4aa61b5a1a61f04e7@google.com>
Reviewed-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>

ganeti/ganeti,mbakke/ganeti,onponomarev/ganeti,andir/ganeti,andir/ganeti,leshchevds/ganeti,ganeti/ganeti,ganeti/ganeti,mbakke/ganeti,leshchevds/ganeti,yiannist/ganeti,yiannist/ganeti,andir/ganeti,yiannist/ganeti,onponomarev/ganeti,leshchevds/ganeti,mbakke/ganeti