Revert "Configurator defaults config directory based on SOURCE env. variable"

This reverts commit 4b58315c37f17ab19856f0760f50ef7de186957b.
Revert "updated specs"

This reverts commit f0b1e93558e29ea263f1e5d2a53fc4754f6305dd.
Fixing Configurator require path in standalone migrations generator
Spec not using 'bundle exec' when running rake task