Fix IpAddressTest on Comcast ISP
Fix IpAddressTest on Comcast ISP

Comcast is nice enough to intercept your DNS queries for bogus hostnames
and return one of their spam pages. Fortunately, they don't seem to do
this for recursive queries:
    ongardie@lappy:~$ host garbagehostname
    garbagehostname has address 208.68.139.38
    Host garbagehostname not found: 3(NXDOMAIN)
    ongardie@lappy:~$ host qqqqqqqqqqqqqqq
    qqqqqqqqqqqqqqq has address 208.68.139.38
    Host qqqqqqqqqqqqqqq not found: 3(NXDOMAIN)
    ongardie@lappy:~$ host comcast.is.a.heaping.pile.of.shit
    Host comcast.is.a.heaping.pile.of.shit not found: 3(NXDOMAIN)
    ongardie@lappy:~$ host comcast-is-a-heaping-pile-of-shit
    comcast-is-a-heaping-pile-of-shit has address 208.68.139.38
    Host comcast-is-a-heaping-pile-of-shit not found: 3(NXDOMAIN)
    ongardie@lappy:~$ host garbage.host.name
    Host garbage.host.name not found: 3(NXDOMAIN)
Based on these Comcastic observations, I changed garbageHostName to
garbage.host.name in the unit tests.

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