Mark call_node_leave_cluster as a static method
Mark call_node_leave_cluster as a static method

Reviewed-by: iustinp


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