Fix for running tests with Ruby 2.0

[#68591002]
Merge remote-tracking branch 'origin/develop' into 60125550-EP81
Add E+ IDD file for 8.1
Update build_version method

Update openstudiocore/ruby/openstudio/energyplus/find_energyplus.rb
build_version method.
Update find_energyplus for version 8.1
Update idd from build 008 to 009
Update idd from build 008 to 009
Update ::getTooVersion

In EnergyPlusJob.cpp, update EnergyPlusJob::getToolVersionImpl line
ToolVersion tv(foo,bar) where foo and bar are the major and minor
versions.
Update plugin to look for 8.1
Update ToolVersion for basement and slab
Update SqlFile for 8.1
Update ::locateEnergyPlus method for 8.1
Merge remote-tracking branch 'ORNL/EP81' into 60125550-EP81