Add json tags to internal fields and basic config test

test/kind-config.yaml

@@ -0,0 +1,6 @@
+kind: Cluster
+apiVersion: kind.x-k8s.io/v1alpha4
+nodes:
+- role: control-plane
+- role: worker
+- role: worker

test/manifests/v1alpha1/configmap.yaml

@@ -0,0 +1,27 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: descheduler-policy-configmap
+  namespace: kube-system
+data:
+  policy.yaml: |
+    apiVersion: "descheduler/v1alpha1"
+    kind: "DeschedulerPolicy"
+    strategies:
+      "RemoveDuplicates":
+         enabled: true
+      "RemovePodsViolatingInterPodAntiAffinity":
+         enabled: true
+      "LowNodeUtilization":
+         enabled: true
+         params:
+           nodeResourceUtilizationThresholds:
+             thresholds:
+               "cpu" : 20
+               "memory": 20
+               "pods": 20
+             targetThresholds:
+               "cpu" : 50
+               "memory": 50
+               "pods": 50

test/manifests/v1alpha2/configmap.yaml

@@ -0,0 +1,29 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: descheduler-policy-configmap
+  namespace: kube-system
+data:
+  policy.yaml: |
+    apiVersion: "descheduler/v1alpha2"
+    kind: "DeschedulerPolicy"
+    profiles:
+      - name: ProfileName
+        pluginConfig:
+        - name: "DefaultEvictor"
+          args:
+            priorityThreshold:
+              value: 10000
+        - name: "PodLifeTime"
+          args:
+            maxPodLifeTimeSeconds: 86400
+            namespaces:
+              include:
+              - "namespace1"
+              - "namespace2"
+        plugins:
+          deschedule:
+            enabled:
+              - "PodLifeTime"
+