Missed a few 'ubuntu -> precise/trusty' changes

428ad273332a647b404a6c340c58880a72e0c898 added trusty builds, and
changed several 'ubuntu' names to either 'precise' or 'trusty';
there were several things connected with the local minion repo that
did not get fixed (the bootstrap script, the salt states for
making the repos, etc.)  This commit is the result of a scan for
'ubuntu' in any case and a replacement/fix for the missing bits.

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Merge pull request #193 from ceph/wip-9048

Missed a few 'ubuntu -> precise/trusty' changes