Feature 10912, 10916: NS Update

	*Added NG-UI support to remove VNF and change VNF in NS update
	*In NS Instances page. Click "Ns Update" in the actions menu.
        *Then a new pop-up page will opened.
        *In the popup there will be drop-down containing Update Type with 'CHANGE_VNFPKG' & 'REMOVE_VNFPKG', membervnfIndex and text field Vnfd Id.
        *When the fields are selected then Click Apply button.
	*For CHANGE_VNFPKG type, the software-version will be checked whether matching or not and corresponding popup will be shown.
        *The pop-up window is closed and the page is directed to "History of operations" page

Change-Id: I135dda039a381b1faa62baa263543e1f210384f7
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>