Add delete_volumes request method for block storage.

lib/fog/hp/block_storage.rb

@@ -14,7 +14,7 @@ module Fog
 
       request_path 'fog/hp/requests/block_storage'
       #request :create_volume
-      #request :delete_volume
+      request :delete_volume
       request :get_volume_details
       request :list_volumes
 

lib/fog/hp/requests/block_storage/delete_volume.rb

@@ -0,0 +1,37 @@
+module Fog
+  module BlockStorage
+    class HP
+      class Real
+
+        # Delete an existing block storage volume
+        #
+        # ==== Parameters
+        # * volume_id<~Integer> - Id of the volume to delete
+        #
+        def delete_volume(volume_id)
+          response = request(
+            :expects  => 202,
+            :method   => 'DELETE',
+            :path     => "os-volumes/#{volume_id}"
+          )
+          response
+        end
+
+      end
+
+      class Mock # :nodoc:all
+
+        def delete_volume(volume_id)
+          response = Excon::Response.new
+          if volume = self.data[:volumes][volume_id]
+            response.status = 202
+          else
+            raise Fog::BlockStorage::HP::NotFound
+          end
+          response
+        end
+      end
+
+    end
+  end
+end