Add list_volumes for block storage.

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

@@ -0,0 +1,52 @@
+module Fog
+  module BlockStorage
+    class HP
+      class Real
+
+        # List existing block storage volumes
+        #
+        # ==== Parameters
+        # None
+        #
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Array>:
+        #     * volumes<~Hash>:
+        #       * 'id'<~Integer>: - Id for the volume
+        #       * 'displayName'<~String>: - Name of the volume
+        #       * 'displayDescription'<~String>: - Description of the volume
+        #       * 'size'<~Integer>: - Size in GB for the volume
+        #       * 'status'<~String>: - Status of the volume i.e. "available"
+        #       * 'volumeType'<~String>: - Type of the volume
+        #       * 'snapshotId'<~String>: - Id of the volume snapshot
+        #       * 'createdAt'<~String>: - Timestamp in UTC when volume was created
+        #       * 'availabilityZone'<~String>: - Availability zone i.e. "nova"
+        #       * attachments<~Array>: Array of hashes of attachments
+        #       * metadata<~Hash>: Hash of metadata for the volume
+        def list_volumes
+          response = request(
+            :expects  => 200,
+            :method   => 'GET',
+            :path     => 'os-volumes'
+          )
+          response
+        end
+
+      end
+
+      class Mock # :nodoc:all
+
+        def list_volumes
+          response = Excon::Response.new
+          volumes = []
+          volumes = self.data[:volumes].values unless self.data[:volumes].nil?
+
+          response.status = 200
+          response.body = { 'volumes' => volumes }
+          response
+        end
+      end
+
+    end
+  end
+end