Add support for ScaledJob (#436)

* Added ScaledJob support

* Fixed getReplicaCount error

* Fixed file length error in fileUtils.test.ts

* Adjust scaledJob spec path

* Made updateImagesInK8sObj more concise

test/unit/manifests/test-scaledjob.yml

@@ -0,0 +1,27 @@
+apiVersion: keda.sh/v1alpha1
+kind: ScaledJob
+metadata:
+   name: test-scaledjob
+   labels:
+      app: test-scaledjob
+spec:
+   jobTargetRef:
+      template:
+         metadata:
+            labels:
+               app: test-scaledjob
+         spec:
+            containers:
+               - name: processor
+                 image: busybox:latest
+                 imagePullPolicy: IfNotPresent
+                 command: ['echo', 'hello world']
+            imagePullSecrets:
+               - name: test-secret
+            restartPolicy: Never
+   triggers:
+      - type: cron
+        metadata:
+           timezone: Etc/UTC
+           start: 0 */5 * * * *
+           end: 1 */5 * * * *