Updated the profiler configuration for the 2.3 changes
merged branch stof/patch-3 (PR #573)

This PR was merged into the 2.3 branch.

Discussion
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Updated the profiler configuration for the 2.3 changes

FrameworkBundle 2.3 changed the way to configure the profiler, and keeping the old configuration does not allow using ``$client->enableProfiler()`` in tests.

This is related to https://github.com/symfony/symfony/issues/8541

Commits
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16adebe Updated the profiler configuration for the 2.3 changes