panic on errors in initializeAuditLogger
panic on errors in initializeAuditLogger

Found when poking at the new containerized Travis CI build with
@rolandshoemaker. This was causing strange panics far away from here
when code would try to log audits when there was no syslog available.

KyleChamberlin/boulder,kuba/boulder,sophie-h/boulder,lucasallan/boulder,lucasallan/boulder,ZCloud-Firstserver/boulder,r0ro/boulder,deserted/boulder,benileo/boulder,lucasallan/boulder,kuba/boulder,modulexcite/boulder,hlandauf/boulder,jsha/boulder,mehmooda/boulder,kuba/boulder,julienschmidt/boulder,lmcro/boulder,ZCloud-Firstserver/boulder,letsencrypt/boulder,kuba/boulder,sophie-h/boulder,KyleChamberlin/boulder,devpaul/boulder,mehmooda/boulder,mommel/boulder,jcjones/boulder,hlandauf/boulder,mehmooda/boulder,hlandauf/boulder,ibukanov/boulder,ZCloud-Firstserver/boulder,mommel/boulder,jmhodges/boulder,deserted/boulder,modulexcite/boulder,josephyzhou/boulder,patf/boulder,josephyzhou/boulder,devpaul/boulder,julienschmidt/boulder,jcjones/boulder,letsencrypt/boulder,modulexcite/boulder,mommel/boulder,KyleChamberlin/boulder,mozmark/boulder,lmcro/boulder,patf/boulder,jsha/boulder,KyleChamberlin/boulder,josephyzhou/boulder,devpaul/boulder,josephyzhou/boulder,ibukanov/boulder,devpaul/boulder,mozmark/boulder,jmhodges/boulder,mommel/boulder,modulexcite/boulder,r0ro/boulder,jcjones/boulder,mozmark/boulder,postfix/boulder,bmw/boulder,patf/boulder,ZCloud-Firstserver/boulder,jfrazelle/boulder,deserted/boulder,lmcro/boulder,hlandauf/boulder,mehmooda/boulder,r0ro/boulder,deserted/boulder,patf/boulder,postfix/boulder,postfix/boulder,postfix/boulder,jmhodges/boulder,jsha/boulder,jfrazelle/boulder,julienschmidt/boulder,benileo/boulder,bmw/boulder,mozmark/boulder,benileo/boulder,sophie-h/boulder,letsencrypt/boulder,jmhodges/boulder,julienschmidt/boulder,benileo/boulder,bmw/boulder,jfrazelle/boulder,jfrazelle/boulder,lmcro/boulder,ibukanov/boulder,r0ro/boulder,jcjones/boulder