Use ruby 2.0.0-p481 so it will compile on trusty

[#75453516]
Use trusty stemcells

[Finishes #75453516]
Remove unnecessary code

tests still pass.  nothing will go wrong.
[#73653220]
Correct version numbers for trusty stemcells

[finishes #75453516]
Add .idea to .gitignore
Add MySQL job to purge old GRA_*.log

[#74890134]