Extract SpecEnvironment into its own file

To make spec_helper smaller [#72354932]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Extract SpecEnvironment into its own file

To slim down spec_helper.rb [#72354932]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>