Add specs for Model#first and Model#one methods
Add specs for Model#first and Model#one methods

sivagollapalli/mongoid,rpocklin/mongoid,arnkorty/mongoid,Numerico/mongoid,arnkorty/mongoid,uniiverse/mongoid,infiverve/mongoid,mongodb/mongoid,eljojo/mongoid,CIRCUITLLC/mongoid,trmmy/mongoid,nviennot/mongoid,parov/mongoid,etomic/mongoid,karmakaze/mongoid,aj0strow/mongoid,stnguyen/mongoid,chetan/mongoid,tricknotes/mongoid,cao7113/mongoid,johnny-miyake/mongoid,jasl/mongoid,zenjoy/mongoid,cao7113/mongoid,zaithottakath/mongoid,joshsoftware/mongoid,CIRCUITLLC/mongoid,subhashb/mongoid,karmakaze/mongoid,kay-kim/mongoid,stnguyen/mongoid,rubrikkfabrikken/mongoid,elia/mongoid,Azzurrio/mongoid,greggroth/mongoid,charliehq/mongoid,canvas-drw/mongoid,itbakery/mongoid,Azzurrio/mongoid,krasnoukhov/mongoid,codedogfish/mongoid,kuadrosx/mongoid,herimedia/mongoid,codedogfish/mongoid,X0nic/mongoid,subhashb/mongoid,rafaelgaspar/mongoid,tzar/mongoid,charliehq/mongoid,kuadrosx/mongoid,nicolasblanco/mongoid,krasnoukhov/mongoid,itbakery/mongoid,mattconnolly/mongoid,kay-kim/mongoid,zBMNForks/mongoid,abezzub/mongoid,robwil/mongoid,hxx/mongoid,wuboy0307/mongoid,mongodb/mongoid,PerfectMemory/mongoid,matbox/mongoid,matbox/mongoid,zBMNForks/mongoid,canvas-drw/mongoid,parov/mongoid,abezzub/mongoid,Welovroi/mongoid,Sharevari-Inc/mongoid,nviennot/mongoid,timgluz/mongoid,trmmy/mongoid,praecipula/mongoid,elia/mongoid,mysociety/mongoid,narutosanjiv/mongoid,Zhomart/mongoid,zaithottakath/mongoid,X0nic/mongoid,imomoisoft/mongoid,rinmu/mongoid,sivagollapalli/mongoid,chetan/mongoid,sideci-sample/sideci-sample-mongoid,jonhyman/mongoid,bjori/mongoid,herimedia/mongoid,jtescher/mongoid,jonhyman/mongoid,jasl/mongoid,mattconnolly/mongoid,sideci-sample/sideci-sample-mongoid,jbrien/mongoid,joshsoftware/mongoid,hxx/mongoid,greggroth/mongoid,bjori/mongoid,praecipula/mongoid,mysociety/mongoid,nusco/mongoid,bencrouse/mongoid,estolfo/mongoid,dustinwatson/mongoid,jbrien/mongoid,kentaroi/mongoid,wuboy0307/mongoid,rinmu/mongoid,hashrocketeer/mongoid,kayakyakr/mongoid,rpocklin/mongoid,imomoisoft/mongoid,kentaroi/mongoid,jtescher/mongoid,Numerico/mongoid,rubrikkfabrikken/mongoid,simi/mongoid,narutosanjiv/mongoid,kcdragon/mongoid,johnny-miyake/mongoid,timgluz/mongoid,drobune/mongoid,tzar/mongoid,drobune/mongoid,simi/mongoid,aj0strow/mongoid,robwil/mongoid,eljojo/mongoid,tricknotes/mongoid,PerfectMemory/mongoid,mongoid/mongoid,demarque/mongoid,demarque/mongoid,glebtv/mongoid,nusco/mongoid,asantamar/mongoid,Sharevari-Inc/mongoid,mongoid/mongoid,amw/mongoid,amw/mongoid,bencrouse/mongoid,asantamar/mongoid,estolfo/mongoid,glebtv/mongoid,kayakyakr/mongoid,mongodb/mongoid,rafaelgaspar/mongoid,zenjoy/mongoid,Zhomart/mongoid,dustinwatson/mongoid,kcdragon/mongoid,Welovroi/mongoid,etomic/mongoid,hashrocketeer/mongoid,uniiverse/mongoid,infiverve/mongoid