Fix correct variable expansion in includes only_if.

There's not need to run the complete include through the templating engine.
Several variables were not included before the conditional was evaluated.

test/TestPlayBook.py

@@ -172,3 +172,28 @@ class TestPlaybook(unittest.TestCase):
        print data
        assert data.find("ears") != -1, "template success"
 
+   def test_includes(self):
+        pb = os.path.join(self.test_dir, 'playbook_includes.yml')
+        actual = self._run(pb)
+
+        for i, event in enumerate(EVENTS):
+            print "EVENT %s"%(i)
+            print event
+
+            if i == 6:
+                assert 'blue' in event[1][1]['cmd']
+
+            if i == 8:
+                assert 'quack' in event[1][1]['cmd']
+
+            if i == 10:
+                assert 'RAN' in event[1][1]['cmd']
+
+            if i == 12:
+                assert 'RAN' in event[1][1]['cmd']
+
+            if i == 14:
+                assert 'red' in event[1][1]['cmd']
+
+            if i == 18 or i == 20:
+                assert 'skipped' in event[0]

test/common_vars.yml

@@ -1,3 +1,4 @@
 ---
 duck: quack
 cow: moo
+extguard: " '$favcolor' == 'blue' "

test/playbook_included.yml

@@ -0,0 +1,14 @@
+---
+- name: test vars
+  action: shell echo $favcolor
+
+- name: test vars_files
+  action: shell echo $duck
+
+- name: test vars condition
+  action: shell echo RAN
+  only_if: $guard
+
+- name: test vars_files condition
+  action: shell echo RAN
+  only_if: $extguard

test/playbook_includes.yml

@@ -0,0 +1,15 @@
+---
+# Test correct variable expansion in included files and only if
+- hosts: all
+  vars:
+    favcolor: "blue"
+    guard: ' "$favcolor" == "blue" '
+  vars_files:
+  - common_vars.yml
+
+  tasks:
+
+  - include: playbook_included.yml
+
+  # test overrides of variables
+  - include: playbook_included.yml favcolor=red