Replace deprecated raw tag with verbatim

[ioleo]

Since 1.12.0 verbatim tag acts as an alias to raw tag. Since 1.21.0 raw tag has been deprecated. This PR replaces the latter with the first.

[ioleo]

@ksn135 I think these are all occurences of {% raw %} and {% endraw %}

[ksn135]

@loostro Yep! Just check it. Warnings are gone.

➜  FormExtensionsBundle git:(master) curl https://patch-diff.githubusercontent.com/raw/symfony2admingenerator/FormExtensionsBundle/pull/67.patch > /tmp/67.patch
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  9949    0  9949    0     0  11400      0 --:--:-- --:--:-- --:--:-- 11957
➜  FormExtensionsBundle git:(master) git apply --check /tmp/67.patch                                                                                            
➜  FormExtensionsBundle git:(master) git apply /tmp/67.patch  
➜  cis3 sf -V
Symfony version 3.0.7-DEV - app/dev/debug

[ksn135]

THANK YOU!