Move lxc-start log file location to var/log/ganeti/lxc
Move lxc-start log file location to var/log/ganeti/lxc

Placing log files under var/log/ganeti/lxc is preferrable than placing
it under var/run/ganeti/lxc.

Signed-off-by: Yuto KAWAMURA(kawamuray) <12589a13a27e6c6eeb0b2b8963a6f3e92691a9e2@gmail.com>
Reviewed-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>

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