rename this method to logstash_has_configs? because we are really checking to see if it has configs, not that it has none. plus this makes it much easier to reuse this same method for other things without the name seeming awkward.
allow action nothing.
We dont need readers defined since the method will set or return
lookup_plugin_class gets executed at instantiation to set @plugin_class.
Add some rescue'ing. Need to clean up error output with Chef::Log
do some sanity checking on configure_plugin to guarantee we have an
enumerable. I might remove this and just catch the error elsewhere but
the resource should also make sure we are safe. hmmm.
moved this to helpers module.