Improve command package isolation.

pkg/commands/build/testdata/testcase-base-only/in/resources/deployment.yaml

@@ -0,0 +1,15 @@
+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+spec:
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx

pkg/commands/build/testdata/testcase-base-only/in/resources/networkpolicy.yaml

@@ -0,0 +1,13 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: nginx
+spec:
+  podSelector:
+    matchExpressions:
+      - {key: app, operator: In, values: [test]}
+  ingress:
+    - from:
+        - podSelector:
+            matchLabels:
+              app: nginx

pkg/commands/build/testdata/testcase-base-only/in/resources/service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+spec:
+  ports:
+    - port: 80
+  selector:
+    app: nginx