add delay script, update CI test to run ruby test first

Author: wing328

samples/client/petstore/ruby/press_anykey_to_continue.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+# a script to simply wait for X seconds before contining the CI tests
+# the delay can help prevent 2 CI tests running at the same time as 
+# all CI tests use the same petstore server for testing.
+
+TIMEOUT=$(( ( RANDOM % 60 )  + 1 ))
+
+read -p 'Press any key to continue or wait for $TIMEOUT seconds' -t $TIMEOUT