AMBARI-17376. Recommendations request execution takes too long time (srimanth)

ambari-server/src/main/resources/scripts/stack_advisor.py

@@ -18,7 +18,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 '''
 
-import json
+import ambari_simplejson as json
 import os
 import sys
 import traceback