Test using project id and token that match VCR cassettes

Without this running `rspec spec` results in

    Failures:

      1) DeployAndDeliver::Project constructor loads a project
         Failure/Error: deliverer = DeployAndDeliver::Project.new(Configuration)
         PivotalTracker::Client::NoToken:
           PivotalTracker::Client::NoToken
         # ./lib/deploy_and_deliver.rb:10:in `initialize'
         # ./spec/deploy_and_deliver_spec.rb:28:in `new'
         # ./spec/deploy_and_deliver_spec.rb:28:in `block (3 levels) in <top (required)>'

      2) DeployAndDeliver::Project deliver_and_report delivers finished stories
         Failure/Error: deliverer = DeployAndDeliver::Project.new(Configuration)
         PivotalTracker::Client::NoToken:
           PivotalTracker::Client::NoToken
         # ./lib/deploy_and_deliver.rb:10:in `initialize'
         # ./spec/deploy_and_deliver_spec.rb:35:in `new'
         # ./spec/deploy_and_deliver_spec.rb:35:in `block (3 levels) in <top (required)>'

spec/deploy_and_deliver_spec.rb

@@ -2,8 +2,8 @@
 require 'vcr'
 
 Configuration = {
-  :pivotal_tracker_token      => ENV['PIVOTAL_TRACKER_TOKEN'],
-  :pivotal_tracker_project_id => ENV['PIVOTAL_TRACKER_PROJECT_ID']
+  :pivotal_tracker_token      => ENV['PIVOTAL_TRACKER_TOKEN'] || '<TOKEN>',
+  :pivotal_tracker_project_id => ENV['PIVOTAL_TRACKER_PROJECT_ID'] || '477915'
 }
 
 VCR.configure do |c|