add test class

This commit adds a class for testing that creates
a volume on a loopback device.

manifests/setup_test_volume.pp

@@ -0,0 +1,28 @@
+class cinder::setup_test_volume(
+  $volume_name     = 'cinder-volumes',
+  $size            = '4G',
+  $loopback_device = '/dev/loop2'
+) {
+
+  Exec {
+    cwd => '/tmp/',
+  }
+
+  exec { "/bin/dd if=/dev/zero of=${volume_name} bs=1 count=0 seek=${size}":
+    unless => "/sbin/vgdisplay ${volume_name}"
+  } ~>
+
+  exec { "/sbin/losetup ${loopback_device} ${volume_name}":
+    refreshonly => true,
+  } ~>
+
+  exec { "/sbin/pvcreate ${loopback_device}":
+    refreshonly => true,
+  } ~>
+
+  exec { "/sbin/vgcreate ${volume_name} ${loopback_device}":
+    refreshonly => true,
+  }
+
+}
+