Update topology to include tag

Tag can be used to specify the sub-shape for the given node.

Signed-off-by: Akash Srivastava <akash.srivastava@openebs.io>

client/app/scripts/charts/node-container.js

@@ -60,6 +60,7 @@ class NodeContainer extends React.Component {
       <GraphNode
         id={this.props.id}
         shape={this.props.shape}
+        tag={this.props.tag}
         label={this.props.label}
         labelMinor={this.props.labelMinor}
         labelOffset={labelOffset}

client/app/scripts/charts/nodes-chart-elements.js

@@ -162,6 +162,7 @@ class NodesChartElements extends React.Component {
         focused={node.get('focused')}
         highlighted={node.get('highlighted')}
         shape={shape}
+        tag={node.get('tag')}
         stacked={node.get('stack')}
         key={node.get('id')}
         id={node.get('id')}