fix(bigtableadmin): update the API

#### bigtableadmin:v1
The following keys were changed:
- schemas.Cluster.properties.defaultStorageType.description
- schemas.Cluster.properties.location.description
- schemas.Cluster.properties.name.description
- schemas.Cluster.properties.state.description
- schemas.Instance.properties.name.description
- schemas.Instance.properties.state.description

#### bigtableadmin:v2
The following keys were changed:
- resources.projects.resources.instances.methods.partialUpdateInstance.parameters.name.description
- resources.projects.resources.instances.methods.update.parameters.name.description
- resources.projects.resources.instances.resources.appProfiles.methods.patch.parameters.name.description
- resources.projects.resources.instances.resources.clusters.methods.update.parameters.name.description
- schemas.AppProfile.properties.description.description
- schemas.AppProfile.properties.name.description
- schemas.Binding.properties.condition.description
- schemas.Cluster.properties.defaultStorageType.description
- schemas.Cluster.properties.location.description
- schemas.Cluster.properties.name.description
- schemas.Cluster.properties.state.description
- schemas.GetPolicyOptions.properties.requestedPolicyVersion.description
- schemas.Instance.properties.name.description
- schemas.Instance.properties.state.description
- schemas.Policy.description
- schemas.Policy.properties.version.description
- schemas.Table.properties.columnFamilies.description
- schemas.Table.properties.granularity.description
- schemas.Table.properties.name.description

discovery/bigtableadmin-v1.json

@@ -96,15 +96,15 @@
   },
   "protocol": "rest",
   "resources": {},
-  "revision": "20200424",
+  "revision": "20200512",
   "rootUrl": "https://bigtableadmin.googleapis.com/",
   "schemas": {
     "Cluster": {
       "description": "A resizable group of nodes in a particular cloud location, capable\nof serving all Tables in the parent\nInstance.",
       "id": "Cluster",
       "properties": {
         "defaultStorageType": {
-          "description": "(`CreationOnly`)\nThe type of storage used by this cluster to serve its\nparent instance's tables, unless explicitly overridden.",
+          "description": "Immutable. The type of storage used by this cluster to serve its\nparent instance's tables, unless explicitly overridden.",
           "enum": [
             "STORAGE_TYPE_UNSPECIFIED",
             "SSD",
@@ -118,11 +118,11 @@
           "type": "string"
         },
         "location": {
-          "description": "(`CreationOnly`)\nThe location where this cluster's nodes and storage reside. For best\nperformance, clients should be located as close as possible to this\ncluster. Currently only zones are supported, so values should be of the\nform `projects/{project}/locations/{zone}`.",
+          "description": "Immutable. The location where this cluster's nodes and storage reside. For best\nperformance, clients should be located as close as possible to this\ncluster. Currently only zones are supported, so values should be of the\nform `projects/{project}/locations/{zone}`.",
           "type": "string"
         },
         "name": {
-          "description": "Required. (`OutputOnly`)\nThe unique name of the cluster. Values are of the form\n`projects/{project}/instances/{instance}/clusters/a-z*`.",
+          "description": "The unique name of the cluster. Values are of the form\n`projects/{project}/instances/{instance}/clusters/a-z*`.",
           "type": "string"
         },
         "serveNodes": {
@@ -131,7 +131,7 @@
           "type": "integer"
         },
         "state": {
-          "description": "(`OutputOnly`)\nThe current state of the cluster.",
+          "description": "Output only. The current state of the cluster.",
           "enum": [
             "STATE_NOT_KNOWN",
             "READY",
@@ -261,11 +261,11 @@
           "type": "object"
         },
         "name": {
-          "description": "Required. (`OutputOnly`)\nThe unique name of the instance. Values are of the form\n`projects/{project}/instances/a-z+[a-z0-9]`.",
+          "description": "The unique name of the instance. Values are of the form\n`projects/{project}/instances/a-z+[a-z0-9]`.",
           "type": "string"
         },
         "state": {
-          "description": "(`OutputOnly`)\nThe current state of the instance.",
+          "description": "Output only. The current state of the instance.",
           "enum": [
             "STATE_NOT_KNOWN",
             "READY",