improve hive playbook

install .12 by default for easy compatability with drill
include fqdn for metastore mysql user access control
default password change
use disketup -F always
layout choices

you get two. 3 node or 6 node. choose by editing the playbook.
historyserver and edgnode added
non RPC services will use eth0 by default
use eth0 for non RPC stuff

optionally can specify a local mirror
remove historyserver from JT, RM

in its own playbook
use fqdn for user grants
default name, added mapr_subnets