Update NavItem to link to new basename

Update NavItem to link to the new basename, `next`. Thus avoiding to
redirec to the old ui.

See: https://www.patternfly.org/v4/documentation/react/components/nav

awx/ui_next/src/components/AppContainer/NavExpandableGroup.jsx

@@ -41,7 +41,7 @@ class NavExpandableGroup extends Component {
             groupId={groupId}
             isActive={this.isActivePath(path)}
             key={path}
-            to={`/#${path}`}
+            to={`/next/#${path}`}
           >
             {title}
           </NavItem>