Allow setting of image for block rync (#123)

There was no mechanism to allow overriding of the
default images for block rsync transfer pods. This
PR allows the user of block rsync to override
the used images

Signed-off-by: Alexander Wels <awels@awels.wels.home>
Co-authored-by: Alexander Wels <awels@awels.wels.home>

state_transfer/transfer/blockrsync/options.go

@@ -24,3 +24,17 @@ func (t *TransferOptions) GetBlockrsyncClientImage() string {
 	}
 	return t.blockrsyncClientImage
 }
+
+type RsyncServerImage string
+
+func (r RsyncServerImage) ApplyTo(opts *TransferOptions) error {
+	opts.blockrsyncServerImage = string(r)
+	return nil
+}
+
+type RsyncClientImage string
+
+func (r RsyncClientImage) ApplyTo(opts *TransferOptions) error {
+	opts.blockrsyncClientImage = string(r)
+	return nil
+}