azureblob: Implemented settier command support on azureblob remote, this supports to

change tier on objects. Added internal test to check if feature flags are set correctly

backend/azureblob/azureblob_internal_test.go

@@ -0,0 +1,20 @@
+// +build !freebsd,!netbsd,!openbsd,!plan9,!solaris,go1.8
+
+package azureblob
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func (f *Fs) InternalTest(t *testing.T) {
+	// Check first feature flags are set on this
+	// remote
+	enabled := f.Features().ListTiers
+	assert.True(t, enabled)
+	enabled = f.Features().SetTier
+	assert.True(t, enabled)
+	enabled = f.Features().GetTier
+	assert.True(t, enabled)
+}