(POOLER-70) Add initial VSphere VM Provider

This commit adds a skeleton VM Provider for VSphere based VM operations.

lib/vmpooler/providers/vsphere.rb

@@ -0,0 +1,17 @@
+module Vmpooler
+  class PoolManager
+    class Provider
+      class VSphere  < Vmpooler::PoolManager::Provider::Base
+
+        def initialize(options)
+         super(options)
+        end
+
+        def name
+          'vsphere'
+        end
+
+      end
+    end
+  end
+end