Don't lookup twice the active request handler.

Add '' around the logged data for easier reading
WICKET-5512 Allow using child selector for JS event bindings
Upgrade ASM from 4.1 to 4.2
Upgrade org.apache.felix:maven-bundle-plugin to 2.4.0
Change the initial capacity of the arraylist for stringResourceLoaders to 6.

Wicket adds 5 in ResourceSettings' constructor. Leave 1 for the user application needs.