chore(env): Adding required env inside chaosengine (#479)

Signed-off-by: shubhamchaudhary <shubham@chaosnative.com>

charts/generic/pod-network-loss/engine.yaml

@@ -18,16 +18,11 @@ spec:
       spec:
         components:
           env:
-
-            #Network interface inside target container
-            - name: NETWORK_INTERFACE
-              value: 'eth0'    
-
-            - name: NETWORK_PACKET_LOSS_PERCENTAGE
-              value: '100'
-
             - name: TOTAL_CHAOS_DURATION
               value: '60' # in seconds
+          
+            - name: NETWORK_PACKET_LOSS_PERCENTAGE
+              value: '100'
 
             # provide the name of container runtime
             # for litmus LIB, it supports docker, containerd, crio
@@ -39,3 +34,7 @@ spec:
             - name: SOCKET_PATH
               value: '/var/run/docker.sock'
             
+            ## percentage of total pods to target
+            - name: PODS_AFFECTED_PERC
+              value: ''
+