Add more tunables for cpu hog scenario

This commit exposes the flags to tweak the number of cores and node
count to hog during the node-cpu-hog scenario.

config/config.yaml

@@ -20,7 +20,7 @@ kraken:
             - scenarios/time_scenarios_example.yml
         -   litmus_scenarios:                              # List of litmus scenarios to load
             - - https://hub.litmuschaos.io/api/chaos/1.10.0?file=charts/generic/node-cpu-hog/rbac.yaml
-              - scenarios/node_hog_engine.yaml
+              - scenarios/node_cpu_hog_engine.yaml
         -   cluster_shut_down_scenarios:
             - - scenarios/cluster_shut_down_scenario.yml
               - scenarios/post_action_shut_down.py

config/config_performance.yaml

@@ -18,7 +18,7 @@ kraken:
             - scenarios/time_scenarios_example.yml
         -   litmus_scenarios:                              # List of litmus scenarios to load
             - - https://hub.litmuschaos.io/api/chaos/1.10.0?file=charts/generic/node-cpu-hog/rbac.yaml
-              - scenarios/node_hog_engine.yaml
+              - scenarios/node_cpu_hog_engine.yaml
         -   cluster_shut_down_scenarios:
             - - scenarios/cluster_shut_down_scenario.yml
               - scenarios/post_action_shut_down.py

scenarios/node_cpu_hog_engine.yaml

@@ -20,6 +20,15 @@ spec:
             # set chaos duration (in sec) as desired
             - name: TOTAL_CHAOS_DURATION
               value: '60'
+
+            # Number of cores of node CPU to be consumed
+            - name: NODE_CPU_CORE
+              value: ''
+
+            # percentage of total nodes to target
+            - name: NODES_AFFECTED_PERC
+              value: ''
+
             # ENTER THE COMMA SEPARATED TARGET NODES NAME
             - name: TARGET_NODES
               value: ''