Filter HSP missing return on CDR path

[braindawg]

Looks like a large conditional was removed from plugins/filters/app_hsp/filter_app_hsp.js in a4260f6 that left a dangling else. That else was cleaned up in f37f4c5, but the body of the else that should have become the default route was also removed, so now this code path has no return.

	    if (raw.message.startsWith('cdr')){
                ...
            }  else { return raw.message; }