fix EOF, DefaultMaxReplicas set to 3, extended user guide about hpa, more tests

add warning in situations like:
- maxreplicas < minreplicas
- value from label < 0
- validate percentage in cpu, memory metrics

script/test/fixtures/hpa/compose.yaml

@@ -4,6 +4,7 @@ services:
     image: nginx
     labels:
       kompose.hpa.cpu: 50
-      kompose.hap.memory: 70
-      kompose.hap.replicas.min: 1
-      kompose.hap.replicas.max: 10
+      kompose.hpa.memory: 70
+      kompose.hpa.replicas.min: 1
+      kompose.hpa.replicas.max: 10
+

script/test/fixtures/hpa/output-k8s.yaml

@@ -45,4 +45,5 @@ spec:
   scaleTargetRef:
     apiVersion: apps/v1
     kind: Deployment
-    name: web
+    name: web
+