rebase: update go-ceph to v0.7.0

updating go-ceph to latest 0.7.0
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/github.com/ceph/go-ceph/cephfs/admin/flags.go

@@ -0,0 +1,60 @@
+// +build !luminous,!mimic
+
+package admin
+
+// For APIs that accept extra sets of "boolean" flags we may end up wanting
+// multiple different sets of supported flags. Example: most rm functions
+// accept a force flag, but only subvolume delete has retain snapshots.
+// To make this somewhat uniform in the admin package we define a utility
+// interface and helper function to merge flags with naming options.
+
+type flagSet interface {
+	flags() map[string]bool
+}
+
+type commonRmFlags struct {
+	force bool
+}
+
+func (f commonRmFlags) flags() map[string]bool {
+	o := make(map[string]bool)
+	if f.force {
+		o["force"] = true
+	}
+	return o
+}
+
+// SubVolRmFlags does not embed other types to simplify and keep the
+// interface with the type flat and simple. At the cost of some code
+// duplication we get a nicer UX for those using the library.
+
+// SubVolRmFlags may be used to specify behavior modifying flags when
+// removing sub volumes.
+type SubVolRmFlags struct {
+	Force           bool
+	RetainSnapshots bool
+}
+
+func (f SubVolRmFlags) flags() map[string]bool {
+	o := make(map[string]bool)
+	if f.Force {
+		o["force"] = true
+	}
+	if f.RetainSnapshots {
+		o["retain-snapshots"] = true
+	}
+	return o
+}
+
+// mergeFlags combines a set of key-value settings with any type implementing
+// the flagSet interface.
+func mergeFlags(m map[string]string, f flagSet) map[string]interface{} {
+	o := make(map[string]interface{})
+	for k, v := range m {
+		o[k] = v
+	}
+	for k, v := range f.flags() {
+		o[k] = v
+	}
+	return o
+}