Make bin/test more robust against ginkgo upgrades breaking the build
Make bin/test more robust against ginkgo upgrades breaking the build

We found that when we upgrade ginkgo in our godeps, our tests tend to go
red and stay red for a while (typically until someone will ssh into a
box and poke around until it's fixed). The solution tends to involve

* upgrading the ginkgo binary
* removing the .a files in the $GOPATH/pkg directory

The previous commit assures we run the ginkgo binary from godep. This
commit ensures we clean out the .a files from the previous test run.

SrinivasChilveri/cli,EngineerBetter/cli,pishro-cc/cli,saravana76/cli,SrinivasChilveri/cli,cgvarela/cli,fujitsu-cf/cli,fujitsu-cf/cli,diatmpravin/cli,mcowger/cli,Zouuup/cli,diatmpravin/cli,rastasheep/trash-can,ReachingOut/cli,ofer43211/cli,srikanth88infy/cli,18F/cli,cf-routing/cli,nttlabs/cli,xingzhou/cli,carnell69/cli,HuaweiTech/cli,markstgodard/cli,TomG713/cli,ofer43211/cli,zhang-hua/cli,evanfarrar/cli,srikanth88infy/cli,zhang-hua/cli,AmitRoushan/cli,cgvarela/cli,rastasheep/trash-can,SrinivasChilveri/cli,cf-routing/cli,SrinivasChilveri/cli,zhang-hua/cli,pishro-cc/cli,AmitRoushan/cli,simonleung8/cli,kavoj/cli,pishro-cc/cli,Zouuup/cli,markstgodard/cli,ReachingOut/cli,HuaweiTech/cli,18F/cli,nttlabs/cli,cgvarela/cli,saravana76/cli,ofer43211/cli,HuaweiTech/cli,kavoj/cli,EngineerBetter/cli,18F/cli,diatmpravin/cli,mcintyred/cli,kavoj/cli,hyenaspots/cli,TomG713/cli,rastasheep/trash-can,hyenaspots/cli,mcowger/cli,AmitRoushan/cli,evanfarrar/cli,simonleung8/cli,diatmpravin/cli,ofer43211/cli,AmitRoushan/cli,saurabhguptasg/cli,HuaweiTech/cli,nttlabs/cli,ReachingOut/cli,fujitsu-cf/cli,markstgodard/cli,EngineerBetter/cli,saurabhguptasg/cli,TomG713/cli,rastasheep/trash-can,cf-routing/cli,nttlabs/cli,mcintyred/cli,markstgodard/cli,saurabhguptasg/cli,cgvarela/cli,Zouuup/cli,zhang-hua/cli,hyenaspots/cli,carnell69/cli,xingzhou/cli,srikanth88infy/cli,mcintyred/cli,xingzhou/cli,evanfarrar/cli,saravana76/cli,saurabhguptasg/cli,kavoj/cli,simonleung8/cli,TomG713/cli,carnell69/cli,saravana76/cli,mcowger/cli,pishro-cc/cli,xingzhou/cli,mcowger/cli,mcintyred/cli,ReachingOut/cli,18F/cli,EngineerBetter/cli,cf-routing/cli,Zouuup/cli,carnell69/cli,hyenaspots/cli,evanfarrar/cli,srikanth88infy/cli