Fix ticket #10663 - Added setCharset method call to PHP templating engine.
bug #10665 [DependencyInjection] Fix ticket #10663 - Added setCharset method call to PHP templating engine (koku)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #10665).

Discussion
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[DependencyInjection] Fix ticket #10663 - Added setCharset method call to PHP templating engine

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10663
| License       | MIT
| Doc PR        | N/A

Commits
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0bc79ca Fix ticket #10663 - Added setCharset method call to PHP templating engine.