Fix RpcRunner._StaticSingleNodeCall
Fix RpcRunner._StaticSingleNodeCall

Unfortunately, a rpc.Client object was passed as the first parameter,
causing the function to always fail.

Found during QA testing.

Reviewed-by: ultrotter


andir/ganeti,ganeti/ganeti,apyrgio/ganeti,grnet/snf-ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,yiannist/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,leshchevds/ganeti,dimara/ganeti,andir/ganeti,bitemyapp/ganeti,bitemyapp/ganeti,mbakke/ganeti,ganeti/ganeti,dimara/ganeti,apyrgio/ganeti,mbakke/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,yiannist/ganeti,yiannist/ganeti,leshchevds/ganeti,onponomarev/ganeti,apyrgio/snf-ganeti,leshchevds/ganeti