Bug 644086

Description of problem:
When you use the deltacloud-core client to create a key, you do something like:

 client = Deltacloud.new(username, password, provider.url)
 key = client.create_key(:name => "#{self.name}_#{Time.now.to_i}_key")
 puts key.pem

However, the value returned in key.pem is actually not directly useful as a private key.  The problem is that the way the pem is encoded, every line begins with 4 spaces.  If you take that pem as-is, write it to a file, and try to use it as a private key, ssh complains that the key isn't useful.  Sure, we could workaround the problem by doing something like:

key.pem.each do |line|
   puts line.strip
end

However, it seems like *every* client that wants to use the key would have to do this, so it would seem better to fix it in the core.

I think the reason this is happening is that the core uses a cdata helper function to return this data:

  def cdata(&block)
    text = capture_haml(&block)
    text.gsub!("\n", "x\n ")
    "<![CDATA[\n #{text}\n]]>"
  end

And you can see there that every newline is suffixed with a newline-space, so we get the extra spaces at the beginning of every line.