Windows: Fixed namespace resolution issue for test builds.
Windows: Fixed namespace resolution issue for test builds.

Review: https://reviews.apache.org/r/53551/

neilconway/mesos,verizonlabs/mesos,abudnik/mesos,verizonlabs/mesos,dforsyth/mesos,craimbert/mesos,reneploetz/mesos,zmalik/mesos,asamerh4/mesos,craimbert/mesos,kaysoky/mesos,craimbert/mesos,chhsia0/mesos,Gilbert88/mesos,reneploetz/mesos,andschwa/mesos,gsantovena/mesos,gsantovena/mesos,kaysoky/mesos,yuquanshan/customizedMesos,reneploetz/mesos,kaysoky/mesos,kaysoky/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,Gilbert88/mesos,reneploetz/mesos,asamerh4/mesos,abudnik/mesos,asamerh4/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,craimbert/mesos,asamerh4/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,jpeach/mesos,verizonlabs/mesos,neilconway/mesos,dforsyth/mesos,abudnik/mesos,craimbert/mesos,dforsyth/mesos,chhsia0/mesos,dforsyth/mesos,yuquanshan/customizedMesos,gsantovena/mesos,abudnik/mesos,kaysoky/mesos,abudnik/mesos,chhsia0/mesos,zmalik/mesos,verizonlabs/mesos,zmalik/mesos,chhsia0/mesos,chhsia0/mesos,verizonlabs/mesos,Gilbert88/mesos,asamerh4/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,abudnik/mesos,Gilbert88/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,yuquanshan/customizedMesos,craimbert/mesos,reneploetz/mesos,dforsyth/mesos,zmalik/mesos,jpeach/mesos,yuquanshan/customizedMesos,neilconway/mesos,asamerh4/mesos,andschwa/mesos,gsantovena/mesos,chhsia0/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,andschwa/mesos,kaysoky/mesos,asamerh4/mesos,Aman-Jain-14/customizedMesos,kaysoky/mesos,yuquanshan/customizedMesos,jpeach/mesos,andschwa/mesos,Gilbert88/mesos,Gilbert88/mesos,chhsia0/mesos,neilconway/mesos,abudnik/mesos,gsantovena/mesos,jpeach/mesos,reneploetz/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,zmalik/mesos,neilconway/mesos,verizonlabs/mesos,gsantovena/mesos,Gilbert88/mesos,jpeach/mesos,andschwa/mesos,zmalik/mesos,neilconway/mesos,jpeach/mesos,jpeach/mesos,yuquanshan/customizedMesos,andschwa/mesos,andschwa/mesos