add 14.04 to supported vagrant distros

10.04 and 14.10 'documented' as broken in the upstream
mysql cookbook
Merge pull request #2315 from opscode/lcg/more-vagrant

add 14.04 to supported vagrant distros
disable workstation tests for aix.
Merge pull request #2320 from ClogenyTechnologies/kd-aix-fixes-wrktn

Disable workstation tests for aix.