stage1/init: set minimum appc-required environment defaults
stage1/init: set minimum appc-required environment defaults

These are currently being set to static root values, will revisit once
the spec matures in this area.

Fixes #687

tixxdz/rkt,Wilybald/rkt,marineam/rkt,lee212/rkt,MattDees/rkt,sstabellini/rkt,rkt/rkt,jjlakis/rkt,liugenping/rkt,xnox/rkt,ChengTiesheng/rkt,dgonyeo/rkt,bsmr-go/rkt,kbrwn/rkt,lee212/rkt,tv42/rkt,rhvgoyal/rkt,rkt/rkt,wparad/rkt,dalanlan/rkt,chrisseto/rkt,Wilybald/rkt,alexhersh/rkt,squaremo/rkt,michelangelo13/rkt,yifan-gu/rocket,kinvolk/rkt,fdserr/rkt,monstermunchkin/rkt,tixxdz/rkt,markllama/rkt,euank/rkt,yifan-gu/rkt,alexhersh/rkt,intelsdi-x/rkt,mjg59/rkt,ramitsurana/rkt,rhvgoyal/rkt,Yhgenomics/rkt,shtouff/rkt,sinfomicien/rkt,nhlfr/rkt,monstermunchkin/rkt,MabinGo/rkt,mjg59/rkt,markllama/rkt,liubq919/rkt,lee212/rkt,alexhersh/rkt,mike1729/rkt,Shashwatsh/rkt,jakon89/rkt,linki/rkt,yifan-gu/rocket,crawford/rkt,fdserr/rkt,Wilybald/rkt,lucasallan/rkt,rkt/rkt,monstermunchkin/rkt,shobhit85/rkt,coreos/rkt,coreos/rkt,tv42/rkt,iankronquist/rkt,marineam/rkt,shobhit85/rkt,linki/rkt,euank/rkt,ChengTiesheng/rkt,klizhentas/rkt,ramitsurana05/rkt,markllama/rkt,iaguis/rkt,yifan-gu/rocket,matthaias/rkt,dgonyeo/rkt,sstabellini/rkt,ybubnov/rkt,liubq919/rkt,xnox/rkt,liugenping/rkt,krnowak/rkt,tixxdz/rkt,jzelinskie/rkt,iaguis/rkt,sstabellini/rkt,intelsdi-x/rkt,jonboulle/rkt,mattthias/pkg-rkt,sgotti/rkt,mike1729/rkt,ramitsurana05/rkt,kbrwn/rkt,wparad/rkt,MattDees/rkt,sinfomicien/rkt,squeed/rkt,euank/rkt,crawford/rkt,maquanyi/rkt,chrisseto/rkt,cab105/rkt,kinvolk/rkt,tmrts/rkt,MattDees/rkt,jasonchaffee/rkt,rhvgoyal/rkt,coreos/rkt,clearlinux/rkt,kinvolk/rkt,dalanlan/rkt,joshix/rkt,luebken/rkt,squaremo/rkt,blixtra/rkt,jzelinskie/rkt,achanda/rkt,intfrr/rkt,krnowak/rkt,mike1729/rkt,sgotti/rkt,krnowak/rkt,jakon89/rkt,sgotti/rkt,intfrr/rkt,ybubnov/rkt,cab105/rkt,jonboulle/rkt,jjlakis/rkt,luebken/rkt,kbrwn/rkt,matthaias/rkt,jasonchaffee/rkt,chrisseto/rkt,tmrts/rkt,alban/rkt,smarvin/rkt,lucasallan/rkt,jjlakis/rkt,crawford/rkt,s-urbaniak/rkt,dgonyeo/rkt,squeed/rkt,intfrr/rkt,iankronquist/rkt,bsmr-go/rkt,adfernandes/rkt,jasonchaffee/rkt,tmrts/rkt,intelsdi-x/rkt,il9ue/rkt,adfernandes/rkt,tv42/rkt,endocode/rkt,fdserr/rkt,achanda/rkt,marineam/rkt,rkt/rkt,endocode/rkt,dalanlan/rkt,akshaykarle/rkt,alban/rkt,luebken/rkt,clearlinux/rkt,adfernandes/rkt,shtouff/rkt,shobhit85/rkt,liubq919/rkt,jonboulle/rkt,rot26/rkt,smarvin/rkt,joshix/rkt,achanda/rkt,Yhgenomics/rkt,mattthias/pkg-rkt,ramitsurana05/rkt,akshaykarle/rkt,michelangelo13/rkt,il9ue/rkt,Yhgenomics/rkt,Shashwatsh/rkt,matthaias/rkt,xnox/rkt,nhlfr/rkt,iankronquist/rkt,jakon89/rkt,cab105/rkt,lucasallan/rkt,squaremo/rkt,jzelinskie/rkt,smarvin/rkt,rot26/rkt,Shashwatsh/rkt,MabinGo/rkt,iaguis/rkt,il9ue/rkt,blixtra/rkt,klizhentas/rkt,michelangelo13/rkt,ramitsurana/rkt,bsmr-go/rkt,lucasallan/rkt,joshix/rkt,MabinGo/rkt,ChengTiesheng/rkt,joshix/rkt,rot26/rkt,mjg59/rkt,maquanyi/rkt,wparad/rkt,yifan-gu/rkt,squeed/rkt,Wilybald/rkt,akshaykarle/rkt,liugenping/rkt,shtouff/rkt,kinvolk/rkt,klizhentas/rkt,yifan-gu/rkt,nhlfr/rkt,endocode/rkt,ramitsurana/rkt,blixtra/rkt,maquanyi/rkt,s-urbaniak/rkt,mattthias/pkg-rkt,ybubnov/rkt,s-urbaniak/rkt,sinfomicien/rkt,alban/rkt,linki/rkt,clearlinux/rkt