Make namespace input optional (#420)

Signed-off-by: Tatsat Mishra <tamishra@microsoft.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tatsinnit <tamishra@microsoft.com>

test/integration/manifests/test_no_ns.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+   name: test-deployment-no-ns
+   labels:
+      app: test-app
+spec:
+   replicas: 1
+   selector:
+      matchLabels:
+         app: test-app
+   template:
+      metadata:
+         labels:
+            app: test-app
+      spec:
+         containers:
+            - name: test-container
+              image: nginx
+              ports:
+                 - containerPort: 80

test/integration/manifests/test_with_ns.yaml

@@ -0,0 +1,22 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+   name: test-deployment
+   namespace: test-namespace
+   labels:
+      app: test-app
+spec:
+   replicas: 1
+   selector:
+      matchLabels:
+         app: test-app
+   template:
+      metadata:
+         labels:
+            app: test-app
+      spec:
+         containers:
+            - name: test-container
+              image: nginx
+              ports:
+                 - containerPort: 80