Fixed problems with Saving Encrypted Password

- Fixed error with non existent grep input on first run
- Fixed chef 11 error when making assignment to read-only node['splunk']['outputsSSLPass']
- Remove unnecessary node.save (also enables Chef Solo deployment in Vagrant)
Added platform identifier for amazon linux
Merge branch 'master' of https://github.com/tguelck/splunk_cookbook into tguelck-master

Conflicts:
	recipes/forwarder.rb