minor #36 [config] use form_themes instead of deprecated form.resources. (aitboudad)

This PR was merged into the master branch.

Discussion
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[config] use form_themes instead of deprecated form.resources.

Commits
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5ad7aed [config] use form_themes instead of deprecated form.resources.

Author: javiereguiluz

app/config/config.yml

@@ -35,9 +35,8 @@ framework:
 twig:
     debug:            "%kernel.debug%"
     strict_variables: "%kernel.debug%"
-    form:
-        resources:
-            - "bootstrap_3_layout.html.twig"
+    form_themes:
+        - "bootstrap_3_layout.html.twig"
 
 # Assetic Configuration (used for managing web assets: CSS, JavaScript, Sass, etc.)
 assetic: