Need to fix hardcoded PATH's and remove extra variable

[dmytro]

@zentahori

I'd like you to work on fixing small issues with recipes.

1. Following lines have hardcoded path's in it:
   https://github.com/dmytro/capistrano-recipes/pull/10/files#diff-58ce518092f6be150736b33edd66d7e4R16,
   https://github.com/dmytro/capistrano-recipes/pull/10/files#diff-58ce518092f6be150736b33edd66d7e4R21
2. Ideally I'd want to find a way to remove variable config_sub_dir, it's too specific to CMS deployment. https://github.com/dmytro/capistrano-recipes/pull/10/files#diff-b018874641b85dcd2cf07ae96e5596c4R153

If there's no way to remove it completely it should be moved to CMS configuration, but definitely it's setting should not be in base.rb.

If it's too difficult to make generic recipe, then we should move it to local_recipes.

[dmytro]

@zentahori

[zentahori]

• It is easier to avoid the hardcoded path regarding No1.
  • #{ghost_content_path}#{config_sub_dir} will be the final path that we want.
• I have no better solution as to how to remove variable config_sub_dir right now.