 Change validate to validates for validating repo name
 Change validate to validates for validating repo name

 - validate is used for custom validation but Rails > 4.2 does not
   complain even if we accidently call it with validates options.
 - Rails 4.2 has raises exception that uniqueness option is not accepted
   by `validate` method.
 - This looks like a typo where we wanted to call `validates`.
 - Also removed a duplicate instance of `validates` which was validating
   repo name again.

codetriage/codetriage,ven0226/codetriage,ngpestelos/codetriage,igas/codetriage,ven0226/codetriage,maclover7/codetriage,VishvajitP/codetriage,avirajkhare00/codetriage,ngpestelos/codetriage,hone/codetriage,cheerfulstoic/codetriage,emilyforst/codetriage,ferdinandrosario/codetriage,ven0226/codetriage,cheerfulstoic/codetriage,colinrubbert/codetriage,avirajkhare00/codetriage,rvasqz86/codetriage,rvasqz86/codetriage,rvasqz86/codetriage,ferdinandrosario/codetriage,VishvajitP/codetriage,emilyforst/codetriage,CjayBillones/codetriage,emilyforst/codetriage,CjayBillones/codetriage,ojengwa/codewarrior,igas/codetriage,cheerfulstoic/codetriage,codetriage/codetriage,maclover7/codetriage,avirajkhare00/codetriage,colinrubbert/codetriage,maclover7/codetriage,codetriage/codetriage,hone/codetriage,ngpestelos/codetriage,CjayBillones/codetriage,igas/codetriage,VishvajitP/codetriage,ojengwa/codewarrior,hone/codetriage,ojengwa/codewarrior,colinrubbert/codetriage,ferdinandrosario/codetriage