rebase: use go-ceph v0.3.0

v0.3.0 adds support for rbd.FeatureSet that can be used to parse the
features of an RBD image. This will be used in the followup commit that
adds rbdVolume.getImageInfo().

Signed-off-by: Niels de Vos <ndevos@redhat.com>

vendor/github.com/ceph/go-ceph/rbd/features_nautilus.go

@@ -0,0 +1,20 @@
+// +build !luminous,!mimic
+
+package rbd
+
+// #include <rbd/librbd.h>
+import "C"
+
+const (
+	// FeatureMigrating is the representation of RBD_FEATURE_MIGRATING from
+	// librbd
+	FeatureMigrating = uint64(C.RBD_FEATURE_MIGRATING)
+
+	// FeatureNameMigrating is the representation of
+	// RBD_FEATURE_NAME_MIGRATING from librbd
+	FeatureNameMigrating = C.RBD_FEATURE_NAME_MIGRATING
+)
+
+func init() {
+	featureNameToBit[FeatureNameMigrating] = FeatureMigrating
+}