     - Added remove function to remove element from a list.      - Modified clear list function to empty the list if it's not empty,        so when the object is converted to json, it will have empty [] list.
     - Added remove function to remove element from a list.
     - Modified clear list function to empty the list if it's not empty,
       so when the object is converted to json, it will have empty [] list.

varunarya10/contrail-generateDS,JioCloud/contrail-generateDS,varunarya10/contrail-generateDS,varunarya10/contrail-generateDS,JioCloud/contrail-generateDS,Juniper/contrail-dev-generateDS,vpramo/contrail-generateDS,vpramo/contrail-generateDS,varunarya10/contrail-generateDS,vpramo/contrail-generateDS,JioCloud/contrail-generateDS,JioCloud/contrail-generateDS,vpramo/contrail-generateDS,vpramo/contrail-generateDS,varunarya10/contrail-generateDS,Juniper/contrail-dev-generateDS,Juniper/contrail-dev-generateDS,JioCloud/contrail-generateDS