fix if hook failure when running under jenkins

Local mode modification done previously faulty.  env[‘WORKSPACE’ is not
the sufficient discriminator to see if script is running under Jenkins.
  This fails on the Jenkins parent jobs since those type of jobs don’t
have WORKSPACE set.

dev-tools/build_randomization.rb

@@ -98,11 +98,8 @@ def generate_property_file(directory, data)
   end
 end
 
-
-if(ENV['WORKSPACE'])
-  #jenkin mode
-  working_directory = ENV['WORKSPACE']
-else
+working_directory = ENV['WORKSPACE'] || '/var/tmp'
+unless(ENV['BUILD_ID'])
   #local mode set up fake environment 
   test_directory = 'tools/hudson.model.JDK/'
   unless(File.exist?(test_directory))