Add SetSecuritycontext for EventListener in Controller.yaml

[khrm]

Put it in the controller.yaml so that a user can refer release.yaml to configure this value instead of digging in the code.
Potentially enable us to run EL in OKD: #1172

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Release Notes

SetSecuritycontext for EventListener in controller deployment can be configured now.

[savitaashture]

@khrm even if i set -el-security-context to false in controller.yaml file its alwasy taking value as true only

[khrm]

@savitaashture I updated controller.yaml file. The way to pass bool is either using =false/true or not passing in case of false.

[savitaashture]

@savitaashture I updated controller.yaml file. The way to pass bool is either using =false/true or not passing in case of false.

Yup it works now as expected 👍

[savitaashture]

/lgtm

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