Removed the kitchen.ec2.yml and using dokken
Removed the kitchen.ec2.yml and using dokken

This commit removed the .kitchen.ec2.yml file and is now using dokken
Amazon Linux docker image is now used to test client side test for
splunk-forwarder tests
Server specific tests were skipped as these failed and changes in this
commit only applies to the splunk-forwarder client installation

Signed-off-by: Christopher Richard <f8f52b3fa9ff54c03ac08fa98d96255bbd11e949@adobe.com>

chef-cookbooks/chef-splunk,chef-cookbooks/chef-splunk,chef-cookbooks/chef-splunk