Change dnsd to contrail-dns, named to contrail-named, rndc to contrail-rndc.
    Add contrail-rndc-confgen, COPYRIGHT files
    change dns.conf to contrail-dns.conf, named.conf to contrail-named.conf
    change dns.log to contrail-dns.log, named log file to contrail/contrail-named.log

Change-Id: I440a9057bc13de91d637f586342766ddb57e6bab
(cherry picked from commit 42715b967faa49e366c354ddd16fb75cc69e4125)
Merge "    Change dnsd to contrail-dns, named to contrail-named, rndc to contrail-rndc.     Add contrail-rndc-confgen, COPYRIGHT files     change dns.conf to contrail-dns.conf, named.conf to contrail-named.conf     change dns.log to contrail-dns.log, named log file to contrail/contrail-named.log" into R2.0