Merge pull request #424 from rightscale/ivory_14_10_acu166821_clean_up_rc5

acu166821 - downgrade evnetmachine version, to be consistent on all plat...
acu170108 - Update readme documents
acu170108 - Bump rightlink version
acu166326 make apt conf generator to create empty /etc/apt/sources.list

(cherry picked from commit 71a871ab0c60f7dabb71f4464c54f40e12ed973e)
Merge pull request #432 from rightscale/ivory_14_11_acu170108_6.0_ga_release

Ivory 14 11 acu170108 6.0 ga release
Merge branch 'v6.0'

* v6.0:
  acu166326 make apt conf generator to create empty /etc/apt/sources.list
  acu170108 - Bump rightlink version
  acu170108 - Update readme documents