Reduce log level of InjectionConfigurator

[bjarkih]

Currently the InjectionConfigurator logs down an error message of injected configuration keys are not found:

twigkit.fig.annotation.InjectionConfigurator : Configuration not found: host

This is way too aggressive as these are not errors - in many cases we have default values or proper handling of missing keys in the application logic.

Suggested implementation

Reduce this logging down to DEBUG.