Fix sudo dependency

[alexpop]

Without this change, an instance without sudo installed, throws this converge error:

$ bundle exec kitchen converge default-centos-6
-----> Starting Kitchen (v1.5.0)
-----> Converging <default-centos-6>...
       Preparing files for transfer
       Preparing dna.json
       Resolving cookbook dependencies with Berkshelf 4.0.1...
       Removing non-cookbook files before transfer
       Preparing validation.pem
       Preparing client.rb
-----> Installing Chef Omnibus (12.5.1)
       Downloading https://www.chef.io/chef/install.sh to file /tmp/install.sh
       Trying curl...
       Download complete.
       sh: line 227: sudo: command not found
>>>>>> Converge failed on instance <default-centos-6>.
>>>>>> Please see .kitchen/logs/default-centos-6.log for more details
>>>>>> ------Exception-------
>>>>>> Class: Kitchen::ActionFailed
>>>>>> Message: SSH exited (127) for command: [sh -c '

chef_omnibus_root="/opt/chef"
chef_omnibus_url="https://www.chef.io/chef/install.sh"
install_flags="-v 12.5.1"
pretty_version="12.5.1"
sudo_sh="sudo -E sh"
version="12.5.1"

tmp_stderr="/tmp/stderr";
---SNIP---
    do_download "$chef_omnibus_url" /tmp/install.sh;
    $sudo_sh /tmp/install.sh $install_flags;

With this PR, the sudo_sh variable set in the provisioning script respects the sudo and sudo_command driver configs.

[chris-rock]

nice idea!

[chris-rock]

👍

[chris-rock]

@alexpop could you please rebase to master?

[afiune]

Long night he @alexpop .. Great job.. 😄

[cheeseplus]

I'm happy to merge this as is but could we get a test too?