Clone submodules after the checkout

[vishalya]

This fixes the scenario when the submodule SHAs are different than the master.
git clone --recursie <branch> doesn't respect the the version of the .gitmodules for the branch.

[chef-supermarket]

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[schisamo]

Looks like there are test failures @vishalya

[vishalya]

@schisamo : is there a way to run the test locally on my machine?

[schisamo]

@vishalya Yep:

bundle install
bundle exec rake unit
bundle exec rake functional