Fix CoordinatorClient::renewLease signature.
Fix CoordinatorClient::renewLease signature.

CoordinatorClient scope was missing from the renewLease definition.

anirajk/RAMCloud,SMatsushi/RAMCloud,alexandermerritt/ramcloud,alexandermerritt/ramcloud,jblomer/ramcloud,QingkaiLu/RAMCloud,jblomer/ramcloud,alexandermerritt/ramcloud,QingkaiLu/RAMCloud,jblomer/ramcloud,alexandermerritt/ramcloud,matrix207/RAMCloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,utah-scs/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud,anirajk/RAMCloud,alexandermerritt/ramcloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,rstutsman/RAMCloud,alexandermerritt/ramcloud,anirajk/RAMCloud,matrix207/RAMCloud,matrix207/RAMCloud,SMatsushi/RAMCloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,rstutsman/RAMCloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,utah-scs/RAMCloud,utah-scs/RAMCloud,rstutsman/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,anirajk/RAMCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud