BUGFIX #533 [CoreBundle] Removed request_analyzer.enable option

This option is now irrelevant and needs to be removed as disabling it breaks some services.

````
sulu_core:
    webspace:
        request_analyzer:
            enabled: false # << this option has been removed
````

__Tasks:__

- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | #533 
| BC Breaks     | This configuration is now invalid
| Doc           |