use junosspace for router list

inventory_provider/routes/classifier.py

 import json
+import re
 
 from flask import Blueprint, Response, current_app, jsonify
 
@@ -26,11 +27,15 @@ def coriant_addresses():
 @routes.route("/juniper-server-addresses", methods=['GET', 'POST'])
 @common.require_accepts_json
 def juniper_addresses():
-    # TODO: definitive way of returning these addresses
-    # TODO: probably this (and corant, infinera routes) can be removed
-    routers = current_app.config[
-        "INVENTORY_PROVIDER_CONFIG"]["routers"]
-    return jsonify([r['hostname'] for r in routers])
+    # TODO: this route (and corant, infinera routes) can be removed
+    r = common.get_redis()
+    routers = []
+    for k in r.keys('junosspace:*'):
+        info = r.get(k.decode('utf-8'))
+        assert info  # sanity: value shouldn't be empty
+        info = json.loads(info.decode('utf-8'))
+        routers.append(info['address'])
+    return jsonify(routers)
 
 
 @routes.route("/trap-metadata/<source_equipment>/<path:interface>",