Make PRR metadata required (kubernetes#2672)

* Add metadata validation and fill in default values

* Update KEP state according to history

* Use 0.0 instead of 1.0 for placeholder

* Leave unknown KEPs as implementable

Author: ehashman

keps/provider-aws/423-network-load-balancer/kep.yaml

@@ -16,3 +16,6 @@ status: implementable
 see-also:
 replaces:
 superseded-by:
+
+latest-milestone: "1.9"
+stage: "alpha"

keps/sig-api-machinery/1027-api-unions/kep.yaml

@@ -20,3 +20,6 @@ see-also:
 replaces:
   - "https://docs.google.com/document/d/1lrV-P25ZTWukixE9ZWyvchfFR0NE2eCHlObiCUgNQGQ"
 superseded-by:
+
+latest-milestone: "1.15"
+stage: "alpha"

keps/sig-api-machinery/1281-network-proxy/kep.yaml

@@ -30,3 +30,6 @@ see-also:
   - "https://github.com/kubernetes-sigs/apiserver-network-proxy - Reference implementations of API Server Network Proxy"
 replaces:
 superseded-by:
+
+latest-milestone: "1.16"
+stage: "alpha"

keps/sig-api-machinery/1601-client-go-context/kep.yaml

@@ -13,3 +13,6 @@ approvers:
 creation-date: 2020-01-23
 last-updated: 2020-01-23
 status: implementable
+
+latest-milestone: "1.18"
+stage: "beta"

keps/sig-api-machinery/2330-migrating-api-objects-to-latest-storage-version/kep.yaml

@@ -13,3 +13,6 @@ approvers:
 creation-date: 2018-08-06
 last-updated: 2019-03-19
 status: implementable
+
+latest-milestone: "1.14"
+stage: "alpha"

keps/sig-api-machinery/2334-graduate-server-side-get-and-partial-objects-to-GA/kep.yaml

@@ -20,3 +20,6 @@ see-also:
   - "https://github.com/kubernetes/community/blob/master/contributors/design-proposals/api-machinery/server-get.md"
 replaces:
 superseded-by:
+
+latest-milestone: "1.15"
+stage: "alpha"

keps/sig-api-machinery/2336-OwnerReference-resource-field/kep.yaml

@@ -16,3 +16,6 @@ editor: "@deads2k"
 creation-date: 2019-06-07
 last-updated: 2019-06-12
 status: implementable
+
+latest-milestone: "0.0"
+stage: "alpha"

keps/sig-api-machinery/2338-graduate-API-gzip-compression-support-to-GA/kep.yaml

@@ -19,3 +19,6 @@ see-also:
   - "https://github.com/kubernetes/kubernetes/issues/44164"
 replaces:
 superseded-by:
+
+latest-milestone: "1.16"
+stage: "beta"

keps/sig-api-machinery/2339-storageversion-api-for-ha-api-servers/kep.yaml

@@ -13,3 +13,6 @@ approvers:
 creation-date: 2019-08-22
 last-updated: 2019-08-22
 status: implementable
+
+latest-milestone: "1.17"
+stage: "alpha"

keps/sig-api-machinery/2523-consistent-resource-versions-semantics/kep.yaml

@@ -12,3 +12,6 @@ approvers:
 creation-date: 2020-03-09
 last-updated: 2020-04-02
 status: implementable
+
+latest-milestone: "0.0"
+stage: "alpha"