Update omnibus/Gemfile.lock
Update omnibus/Gemfile.lock

For compatibility with omnibus-toolchain 3.0.0

Signed-off-by: Jeremiah Snapp <a9df78b4b5c00745f26b0821b2cc57336a474862@chef.io>

chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server