Petals CDK

In order for PETALSESBCONT-424 to be realised, ExecutionContext is not going to be used anymore. Unfortunately, some code in the CDK calls ExecutionContext instead of using the API provided by PetalsExecutionContext (that used ExecutionContext internally in the past and that will replace it with slf4j's MDC). This will impacts all the components that want to run on the container 5.0.2+. A a side note, it also means that any dependency to jcl-over-slf4j, log4j-over-slf4j, slf4j-jdk14 or slf4j-api will be removed from the components zip (because they are already present in the system classloader, see PETALSDISTRIB-256)