weave: Upgrade to 2.5.0 (#3660)

* weave: Upgrade to 2.5.0

Upstream Changes:

-   weave 2.5.0 (https://github.com/weaveworks/weave/releases/tag/v2.5.0)
-   Adds support for Kubernetes `hostPort` mapping
-   Adds support for Kubernetes `ipBlock` NetworkPolicy feature

Our Changes:

-   Templates sync with upstream manifests
-   Remove legacy nodePort fix

* BC for weave < 2.5.0

roles/network_plugin/weave/templates/10-weave.conflist.j2

@@ -0,0 +1,16 @@
+{
+    "cniVersion": "0.3.0",
+    "name": "weave",
+      "plugins": [
+        {
+            "name": "weave",
+            "type": "weave-net",
+            "hairpinMode": {{ weave_hairpin_mode | bool | lower }}
+        },
+        {
+            "type": "portmap",
+            "capabilities": {"portMappings": true},
+            "snat": true
+        }
+    ]
+}