Allow non-const references in cpplint
Allow non-const references in cpplint

alexandermerritt/ramcloud,mrdiegoa/ramcloud,jblomer/ramcloud,jblomer/ramcloud,jcarreira/ramcloud,Frank-Wu/RamCloud,QingkaiLu/RAMCloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,rstutsman/RAMCloud,behnamm/cs244b_project,anirajk/RAMCloud,jcarreira/ramcloud,Frank-Wu/RamCloud,jblomer/ramcloud,behnamm/cs244b_project,Frank-Wu/RamCloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,behnamm/cs244b_project,Frank-Wu/RamCloud,alexandermerritt/ramcloud,jcarreira/ramcloud,taschik/ramcloud-load-manager,DavidLi2010/ramcloud,QingkaiLu/RAMCloud,matrix207/RAMCloud,taschik/ramcloud,matrix207/RAMCloud,jcarreira/ramcloud,alexandermerritt/ramcloud,rstutsman/RAMCloud,mrdiegoa/ramcloud,mrdiegoa/ramcloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,mrdiegoa/ramcloud,alexandermerritt/ramcloud,jblomer/ramcloud,anirajk/RAMCloud,utah-scs/RAMCloud,jblomer/ramcloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,matrix207/RAMCloud,taschik/ramcloud,y-higuchi/ramcloud,taschik/ramcloud-load-manager,SMatsushi/RAMCloud,y-higuchi/ramcloud,DavidLi2010/ramcloud,SMatsushi/RAMCloud,alexandermerritt/ramcloud,utah-scs/RAMCloud,DavidLi2010/ramcloud,Frank-Wu/RamCloud,jblomer/ramcloud,taschik/ramcloud-load-manager,mrdiegoa/ramcloud,IMCG/RamCloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,utah-scs/RAMCloud,y-higuchi/ramcloud,anirajk/RAMCloud,taschik/ramcloud,IMCG/RamCloud,taschik/ramcloud,jcarreira/ramcloud,rstutsman/RAMCloud,QingkaiLu/RAMCloud,y-higuchi/ramcloud,taschik/ramcloud-load-manager,IMCG/RamCloud,IMCG/RamCloud,mrdiegoa/ramcloud,utah-scs/RAMCloud,behnamm/cs244b_project,anirajk/RAMCloud,taschik/ramcloud,DavidLi2010/ramcloud,IMCG/RamCloud,anirajk/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,y-higuchi/ramcloud,SMatsushi/RAMCloud,taschik/ramcloud-load-manager,behnamm/cs244b_project,QingkaiLu/RAMCloud,DavidLi2010/ramcloud,matrix207/RAMCloud,SMatsushi/RAMCloud,y-higuchi/ramcloud,jcarreira/ramcloud,IMCG/RamCloud,DavidLi2010/ramcloud,behnamm/cs244b_project