fixed the profiler when an uncalled listener throws an exception when instantiated
bug #10564 fixed the profiler when an uncalled listener throws an exception when instantiated (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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fixed the profiler when an uncalled listener throws an exception when instantiated

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10371
| License       | MIT
| Doc PR        | n/a

When the profiler gets the uncalled listeners, the current page is broken without a very clear message. That happens when a listener is a service that depends for instance on the request; creating this service throws an exception.

After this patch, if we cannot get the listeners, we give up and add a log message about the problem (the error message is an info as the problem is not really related to the toolbar but more about how things work).

Commits
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79540d4 fixed the profiler when an uncalled listener throws an exception when instantiated