Update SymfonyRequirements.php

Adapt the cache and logs permission requirements to the 3.0 structure
bug #133 Update SymfonyRequirements.php (mmf-amarcos)

This PR was merged into the 3.0.x-dev branch.

Discussion
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Update SymfonyRequirements.php

Adapt the cache and logs permission requirements to the 3.0 structure

Commits
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02bfcf7 Update SymfonyRequirements.php