Fix Bug 2292: Invalid Member VNF index in Manual Scaling after NS Update remove operation

	- Will get member vnf index value from vnfinstances api instead
	  of nsinstances api in manual scaling.
	- Also made code refactoring in other components to avoid linting issue

Change-Id: I30de65c6fe23ddbf560ab45a8505759c4adb5978
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>
diff --git a/src/models/VNFInstanceModel.ts b/src/models/VNFInstanceModel.ts
index de69c1e..4fd63db 100644
--- a/src/models/VNFInstanceModel.ts
+++ b/src/models/VNFInstanceModel.ts
@@ -79,3 +79,9 @@
     VNFD?: string;
     VNFID?: string;
 }
+/** interface for the nsdInstanceData */
+export interface InstanceData {
+    MemberIndex?: string;
+    VNFInstanceId?: string;
+    VNFD?: string;
+}