Resynch runtimes.json with upstream (#423)

1. Add ballerina as an action kind.
2. Remove obsolete Swift, PHP, and Python kinds
diff --git a/helm/openwhisk/runtimes.json b/helm/openwhisk/runtimes.json
index 36b55c9..07393c1 100644
--- a/helm/openwhisk/runtimes.json
+++ b/helm/openwhisk/runtimes.json
@@ -52,21 +52,8 @@
         ],
         "python": [
             {
-                "kind": "python",
-                "image": {
-                    "prefix": "openwhisk",
-                    "name": "python2action",
-                    "tag": "d6a8920"
-                },
-                "deprecated": false,
-                "attached": {
-                    "attachmentName": "codefile",
-                    "attachmentType": "text/plain"
-                }
-            },
-            {
                 "kind": "python:2",
-                "default": true,
+                "default": false,
                 "image": {
                     "prefix": "openwhisk",
                     "name": "python2action",
@@ -80,6 +67,7 @@
             },
             {
                 "kind": "python:3",
+                "default": true,
                 "image": {
                     "prefix": "openwhisk",
                     "name": "python3action",
@@ -94,33 +82,6 @@
         ],
         "swift": [
             {
-                "kind": "swift:3.1.1",
-                "image": {
-                    "prefix": "openwhisk",
-                    "name": "action-swift-v3.1.1",
-                    "tag": "1.0.3"
-                },
-                "deprecated": false,
-                "attached": {
-                    "attachmentName": "codefile",
-                    "attachmentType": "text/plain"
-                }
-            },
-            {
-                "kind": "swift:4.1",
-                "default": false,
-                "image": {
-                    "prefix": "openwhisk",
-                    "name": "action-swift-v4.1",
-                    "tag": "5aacba1"
-                },
-                "deprecated": false,
-                "attached": {
-                    "attachmentName": "codefile",
-                    "attachmentType": "text/plain"
-                }
-            },
-            {
                 "kind": "swift:4.2",
                 "default": true,
                 "image": {
@@ -154,34 +115,6 @@
         ],
         "php": [
             {
-                "kind": "php:7.1",
-                "default": false,
-                "deprecated": false,
-                "image": {
-                    "prefix": "openwhisk",
-                    "name": "action-php-v7.1",
-                    "tag": "a68bb79"
-                },
-                "attached": {
-                    "attachmentName": "codefile",
-                    "attachmentType": "text/plain"
-                }
-            },
-            {
-                "kind": "php:7.2",
-                "default": false,
-                "deprecated": false,
-                "image": {
-                    "prefix": "openwhisk",
-                    "name": "action-php-v7.2",
-                    "tag": "a68bb79"
-                },
-                "attached": {
-                    "attachmentName": "codefile",
-                    "attachmentType": "text/plain"
-                }
-            },
-            {
                 "kind": "php:7.3",
                 "default": true,
                 "deprecated": false,
@@ -244,6 +177,22 @@
                     "attachmentType": "text/plain"
                 }
             }
+        ],
+        "ballerina": [
+            {
+                "kind": "ballerina:0.990",
+                "default": true,
+                "image": {
+                    "prefix": "openwhisk",
+                    "name": "action-ballerina-v0.990.2",
+                    "tag": "latest"
+                },
+                "deprecated": false,
+                "attached": {
+                    "attachmentName": "codefile",
+                    "attachmentType": "text/plain"
+                }
+            }
         ]
     },
     "blackboxes": [