Only push the tag when tagging a release.
Only push the tag when tagging a release.

Git prefers branches to tags so be explicit.

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