Use mount point rather than directory for quota

Use mountpoint for quota rather than directory in filesystem.  "quota -f"
expects a mount point or device so grab that from "df".  Series of shell
commands taken from oo-init-quota.
Misc Bugfixes:
  - Fix BZ 1027089: htpasswd dependencies fixed
  - Fix few package definiton which did not wait on install_method requirement
  - Fix require for SecureRandom (RHEL 6)
  - Fix setting of cloud domain
  - Fix avahi (mdns) installation
Merge pull request #126 from kraman/bugfix

Misc Bugfixes
Merge pull request #121 from charlessimpson/node-quota

Use mount point rather than directory for quota