Add audit config option for metricsServer

[gauron99]

add new fields for metricsServer into KedaController resource for basic audit flags. (other specific options can be added via 'Args' field)

• edit README with new fields
• edit hack/ yaml with new fields
• add tests for new properties

fixes #114

[gauron99]

@zroubalik i did done do it. PTAL pls. I bumped gomega package 4 versions. (not sure if necessary but it matches keda).

• I had to create new test because if i were to do exactly the same thing inside the "functionality" package as new Context, it fails for reasons i do not understand