Removed define for gtests to use its own tr1 tuple.
Removed define for gtests to use its own tr1 tuple.

gtest's tr1::tuple conficts with std::tr1::tuple for gcc-4.4. However,
we use tuple throughout mesos so we assume tr1::tuple or tuple is
available. As such, we don't need gtest to define one.

Review: https://reviews.apache.org/r/18722

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