Refactor producer invocation in cucumber features:

Use "When I successfully execute" instead of "When I execute", and
assert that exit status code was successful in this new step.

features/actions/echo.feature

@@ -7,6 +7,5 @@ Feature: `echo' task action
         echo 'hello'
       end
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain exactly "hello\n"

features/actions/sh.feature

@@ -22,7 +22,7 @@ Feature: sh task action
         sh '\echo from remote'
       end
       """
-    When I execute the recipe
+    When I successfully execute the recipe
     Then the output must contain "from remote"
 
   Scenario: aborts on failed command execution

features/recipes/evaluation.feature

@@ -5,6 +5,5 @@ Feature: recipe evaluation
       """
       puts 'hello from recipe'
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain exactly "hello from recipe\n"

features/recipes/source.feature

@@ -11,6 +11,5 @@ Feature: `source' recipe keyword
       """
       puts 'sourced recipe'
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain "sourced recipe"

features/recipes/target.feature

@@ -7,6 +7,5 @@ Feature: `target' recipe keyword
 
       puts env.target
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain exactly "some_host.example\n"

features/steps/recipe_steps.rb

@@ -5,3 +5,8 @@ end
 When(/^I execute the recipe$/) do
   run_simple('producer recipe.rb', false)
 end
+
+When(/^I successfully execute the recipe$/) do
+  step 'I execute the recipe'
+  assert_exit_status(0)
+end

features/tasks/condition.feature

@@ -9,6 +9,5 @@ Feature: `condition' task keyword
         echo 'evaluated'
       end
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must not contain "evaluated"

features/tasks/evaluation.feature

@@ -7,6 +7,5 @@ Feature: task evaluation
         puts 'hello from recipe'
       end
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain exactly "hello from recipe\n"

features/tests/has_env.feature

@@ -12,8 +12,7 @@ Feature: `has_env' condition keyword
         echo 'evaluated'
       end
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must contain "evaluated"
 
   Scenario: fails when remote environment variable is not defined
@@ -27,6 +26,5 @@ Feature: `has_env' condition keyword
         echo 'evaluated'
       end
       """
-    When I execute the recipe
-    Then the exit status must be 0
+    When I successfully execute the recipe
     And the output must not contain "evaluated"