Correct pattern arg for rspec

Author: kpaulisse

rake/common.rb

@@ -3,7 +3,7 @@
 PUPPET_BINARY = File.join(BASEDIR, 'bin', 'puppet').freeze
 TEST_COMMAND = begin
   if ENV['TRAVIS']
-    "rspec --suffix '_spec.rb$'"
+    "rspec --pattern '*_spec.rb'"
   else
     "parallel_rspec --suffix '_spec.rb$'"
   end