Enable remote repos at a lower priority

This will enable the yum repos at a lower priority than the
  local cache repo.
Also removed some old bluez-utils stuff we don't use/need.
add telnet to cached packages
install telnet at bootstrap
Merge pull request #169 from casharma/install/telnet

Install/telnet
Merge pull request #168 from casharma/add/yum-priorities

Enable remote repos at a lower priority
TRAINVM-47: do not check for updates
Merge pull request #170 from casharma/bugfix/TRAINVM-47

TRAINVM-47: do not check for updates