#1474 | Richa | Added APIs to fetch supervisory node by id and search nodes by name.
#1474 | Added supervisory-node-controller js, module, and resource in services.js to fetch nodes.
#1474 | Adding supervisory node create page.
#1474 | Search, select and clear parent node on supervisory node create page.
#1474 | Removing redundant ResponseEntity from SupervisoryNodeController and tests.