Bugfix: delete node handle from index space when deleting node.
Bugfix: delete node handle from index space when deleting node.

sid17/weaver,dubey/weaver,sid17/weaver,Determinant/weaver,sid17/weaver,dubey/weaver,Determinant/weaver,Determinant/weaver,sid17/weaver,dubey/weaver,dubey/weaver,Determinant/weaver