Add total chaos duration and chaos interval in container kill engine and typo fixes (#222)

Signed-off-by: Udit Gaurav <uditgaurav@gmail.com>

charts/generic/container-kill/engine.yaml

@@ -26,3 +26,11 @@ spec:
             # specify the name of the container to be killed
             - name: TARGET_CONTAINER
               value: 'nginx'
+
+            # provide the chaos interval
+            - name: CHAOS_INTERVAL
+              value: '10'
+
+            # provide the total chaos duration
+            - name: TOTAL_CHAOS_DURATION
+              value: '20'

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

@@ -1,7 +1,7 @@
 apiVersion: litmuschaos.io/v1alpha1
 kind: ChaosEngine
 metadata:
-  name:  nginx-network-chaos
+  name: nginx-network-chaos
   namespace: default
 spec:
   # It can be delete/retain

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

@@ -1,7 +1,7 @@
 apiVersion: litmuschaos.io/v1alpha1
 kind: ChaosEngine
 metadata:
-  name:  nginx-network-chaos
+  name: nginx-network-chaos
   namespace: default
 spec: 
   # It can be delete/retain