Vagrantfile: Test directly for `lxc-ls`.
Vagrantfile: Test directly for `lxc-ls`.

This avoids giving the same "no such command" error on Linux machines
that don't have LXC installed as we now avoid on non-Linux.

rishig/zulip,rishig/zulip,brainwane/zulip,timabbott/zulip,eeshangarg/zulip,hackerkid/zulip,timabbott/zulip,punchagan/zulip,synicalsyntax/zulip,showell/zulip,showell/zulip,synicalsyntax/zulip,shubhamdhama/zulip,synicalsyntax/zulip,hackerkid/zulip,dhcrzf/zulip,rishig/zulip,zulip/zulip,shubhamdhama/zulip,andersk/zulip,eeshangarg/zulip,timabbott/zulip,rht/zulip,andersk/zulip,hackerkid/zulip,jackrzhang/zulip,andersk/zulip,jackrzhang/zulip,punchagan/zulip,zulip/zulip,brainwane/zulip,dhcrzf/zulip,kou/zulip,synicalsyntax/zulip,hackerkid/zulip,tommyip/zulip,andersk/zulip,brainwane/zulip,hackerkid/zulip,synicalsyntax/zulip,synicalsyntax/zulip,brainwane/zulip,rht/zulip,tommyip/zulip,rht/zulip,showell/zulip,eeshangarg/zulip,rht/zulip,showell/zulip,eeshangarg/zulip,zulip/zulip,zulip/zulip,zulip/zulip,hackerkid/zulip,kou/zulip,kou/zulip,dhcrzf/zulip,brainwane/zulip,andersk/zulip,tommyip/zulip,kou/zulip,tommyip/zulip,brainwane/zulip,rht/zulip,dhcrzf/zulip,punchagan/zulip,eeshangarg/zulip,rishig/zulip,timabbott/zulip,tommyip/zulip,andersk/zulip,kou/zulip,punchagan/zulip,brainwane/zulip,jackrzhang/zulip,eeshangarg/zulip,rishig/zulip,shubhamdhama/zulip,hackerkid/zulip,punchagan/zulip,timabbott/zulip,jackrzhang/zulip,andersk/zulip,rishig/zulip,jackrzhang/zulip,rht/zulip,jackrzhang/zulip,showell/zulip,kou/zulip,dhcrzf/zulip,tommyip/zulip,tommyip/zulip,shubhamdhama/zulip,punchagan/zulip,showell/zulip,dhcrzf/zulip,zulip/zulip,shubhamdhama/zulip,dhcrzf/zulip,eeshangarg/zulip,punchagan/zulip,showell/zulip,kou/zulip,shubhamdhama/zulip,timabbott/zulip,rht/zulip,shubhamdhama/zulip,jackrzhang/zulip,zulip/zulip,rishig/zulip,synicalsyntax/zulip,timabbott/zulip