Skip unnecessary :context|:all hooks

This makes that previous test pass, and the test suite is still green,
so I'm _assuming_ that this works and doesn't break other stuff!
However, I'd be happy to make any alterations if this doesn't look like
it's the right way of tackling this problem.

Author: devonestes

lib/rspec/core/hooks.rb

@@ -503,6 +503,8 @@ def all_hooks_for(position, scope)
         end
 
         def run_owned_hooks_for(position, scope, example_or_group)
+          return if example_or_group.class.respond_to?(:metadata) &&
+                      example_or_group.class.metadata.keys.include?(:skip)
           matching_hooks_for(position, scope, example_or_group).each do |hook|
             hook.run(example_or_group)
           end