Fixing Hive metastore install on Ubuntu 12.04.
Needed to include retry_helpers in configure now
Reworking data disks to detect/use ephemeral disks if available
Switch to storing Cluster.Instances in CmServerService and filtering host list to find the correct one, rather than making assumptions about hostnames equating to host ids.
Merge pull request #6 from abayer/master

A number of fixes