add missing DatabaseCleaner configuration for RSpec

Author: DanielKehoe

spec/spec_helper.rb

@@ -38,4 +38,14 @@
   # the seed, which is printed after each run.
   #     --seed 1234
   config.order = "random"
+  
+  config.before(:suite) do
+    DatabaseCleaner.strategy = :truncation
+  end
+  config.before(:each) do
+    DatabaseCleaner.start
+  end
+  config.after(:each) do
+    DatabaseCleaner.clean
+  end
 end