added fluentd_gem provider

this provider will be used to install fluentd plugins

lib/puppet/provider/package/fluentd-gem.rb

@@ -0,0 +1,25 @@
+require 'puppet/provider/package'
+require 'uri'
+
+# Ruby gems support.
+Puppet::Type.type(:package).provide :fluentd_gem, :parent => :gem do
+  desc "Fluentd (td-agent) Embedded Ruby Gem support. If a URL is passed via `source`, then
+    that URL is used as the remote gem repository; if a source is present but is
+    not a valid URL, it will be interpreted as the path to a local gem file.  If
+    source is not present at all, the gem will be installed from the default gem
+    repositories."
+
+  has_feature :versionable, :install_options
+
+  commands :gemcmd => "/opt/td-agent/embedded/bin/gem"
+
+  def uninstall
+    command = [command(:gemcmd), "uninstall"]
+    command << "-x" << "-a" << resource[:name]
+    output = execute(command)
+
+    # Apparently some stupid gem versions don't exit non-0 on failure
+    self.fail "Could not uninstall: #{output.chomp}" if output.include?("ERROR")
+  end
+
+end