fix lint error in MasterServiceTest.cc
fix lint error in MasterServiceTest.cc

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