Set package initial status if its empty (#1522)

If the user applies package YAML file has no status field,
the package won't be able to be compiled or deployed due
to lack of status. This PR aims to add a check at buildermgr
to set initial package status to those packages.

test/tests/test_kubectl/spec-yaml/function-go.yaml

@@ -0,0 +1,47 @@
+apiVersion: fission.io/v1
+kind: Package
+metadata:
+  creationTimestamp: null
+  name: go-b4bbb0e0-2d93-47f0-8c4e-eea644eec2a9
+  namespace: default
+spec:
+  deployment:
+    checksum: {}
+  environment:
+    name: go-spec-kubectl
+    namespace: default
+  source:
+    checksum:
+      sum: aa595bb952047c517d849f8fc9e490fdabc37d83795392074a0b15a59748004f
+      type: sha256
+    type: url
+    url: https://raw.githubusercontent.com/fission/fission/master/examples/go/hello.gogo # this is intentional
+
+---
+apiVersion: fission.io/v1
+kind: Function
+metadata:
+  creationTimestamp: null
+  name: go-spec-kubectl
+  namespace: default
+spec:
+  InvokeStrategy:
+    ExecutionStrategy:
+      ExecutorType: poolmgr
+      MaxScale: 0
+      MinScale: 0
+      SpecializationTimeout: 120
+      TargetCPUPercent: 0
+    StrategyType: execution
+  configmaps: null
+  environment:
+    name: go-spec-kubectl
+    namespace: default
+  functionTimeout: 60
+  package:
+    functionName: Handler
+    packageref:
+      name: go-b4bbb0e0-2d93-47f0-8c4e-eea644eec2a9
+      namespace: default
+  resources: {}
+  secrets: null