Pull all shared request/response structs in RPC layer out to single definitions
Pull all shared request/response structs in RPC layer out to single definitions

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