Explicitly depend on 'apt' cookbook, so that it is fully initialized and ready for the 'monit' cookbook

cf. http://stackoverflow.com/questions/20361738/include-recipe-vs-vagrantfile-chef-add-recipe-whats-the-difference/20375077#20375077

Without this, one would get the following traceback:

    Recipe: amoeba_basenode::default
      * chef_gem[chef-rewind] action install (up to date)
    S

    ================================================================================
    Recipe Compile Error in /home/vagrant/chef-solo/cookbooks-3/amoeba_basenode/recipes/default.rb
    ================================================================================

    NameError
    ---------
    Cannot find a resource for apt_installed? on ubuntu version 12.04

    Cookbook Trace:
    ---------------
      /home/vagrant/chef-solo/cookbooks-3/apt/recipes/default.rb:26:in `from_file'
      /home/vagrant/chef-solo/cookbooks-3/monit/recipes/default.rb:6:in `from_file'
      /home/vagrant/chef-solo/cookbooks-3/amoeba_basenode/recipes/monit.rb:11:in `from_file'
      /home/vagrant/chef-solo/cookbooks-3/amoeba_basenode/recipes/default.rb:20:in `block in from_file'
      /home/vagrant/chef-solo/cookbooks-3/amoeba_basenode/recipes/default.rb:19:in `each'
      /home/vagrant/chef-solo/cookbooks-3/amoeba_basenode/recipes/default.rb:19:in `from_file'

    Relevant File Content:
    ----------------------
    /home/vagrant/chef-solo/cookbooks-3/apt/recipes/default.rb:

     19:  #
     20:
     21:  # On systems where apt is not installed, the resources in this recipe are not
     22:  # executed. However, they _must_ still be present in the resource collection
     23:  # or other cookbooks which notify these resources will fail on non-apt-enabled
     24:  # systems.
     25:
     26>> Chef::Log.debug 'apt is not installed. Apt-specific resources will not be executed.' unless apt_installed?
     27:
     28:  first_run_file = File.join(Chef::Config[:file_cache_path], "apt_compile_time_update_first_run")
     29:
     30:  # If compile_time_update run apt-get update at compile time
     31:  if node['apt']['compile_time_update'] && ( !::File.exist?('/var/lib/apt/periodic/update-success-stamp') || !::File.exist?(first_run_file) )
     32:    e = bash 'apt-get-update at compile time' do
     33:      code <<-EOH
     34:        apt-get update
     35:        touch #{first_run_file}