Fixed coding style issue in Node class
Fixed coding style issue in Node class

Removed the space between & and the parameter type

Review: https://reviews.apache.org/r/28382

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