feat(bigquery): update the api

#### bigquery:v2

The following keys were added:
- schemas.TrainingOptions.properties.boosterType.type (Total Keys: 1)
- schemas.TrainingOptions.properties.colsampleBylevel (Total Keys: 2)
- schemas.TrainingOptions.properties.colsampleBynode (Total Keys: 2)
- schemas.TrainingOptions.properties.colsampleBytree (Total Keys: 2)
- schemas.TrainingOptions.properties.dartNormalizeType.type (Total Keys: 1)
- schemas.TrainingOptions.properties.minTreeChildWeight (Total Keys: 2)
- schemas.TrainingOptions.properties.numParallelTree (Total Keys: 2)
- schemas.TrainingOptions.properties.treeMethod.type (Total Keys: 1)

Author: yoshi-automation

docs/dyn/bigquery_v2.jobs.html

@@ -82,7 +82,7 @@ <h2>Instance Methods</h2>
 <p class="firstline">Close httplib2 connections.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(projectId, jobId, location=None)</a></code></p>
-<p class="firstline">Requests that a job is deleted. This call will return when the job is deleted. This method is available in limited preview.</p>
+<p class="firstline">Requests the deletion of the metadata of a job. This call returns when the job's metadata is deleted.</p>
 <p class="toc_element">
   <code><a href="#get">get(projectId, jobId, location=None)</a></code></p>
 <p class="firstline">Returns information about a specific job. Job information is available for a six month period after creation. Requires that you're the person who ran the job, or have the Is Owner project role.</p>
@@ -728,11 +728,11 @@ <h3>Method Details</h3>
 
 <div class="method">
     <code class="details" id="delete">delete(projectId, jobId, location=None)</code>
-  <pre>Requests that a job is deleted. This call will return when the job is deleted. This method is available in limited preview.
+  <pre>Requests the deletion of the metadata of a job. This call returns when the job&#x27;s metadata is deleted.
 
 Args:
-  projectId: string, Required. Project ID of the job to be deleted. (required)
-  jobId: string, Required. Job ID of the job to be deleted. If this is a parent job which has child jobs, all child jobs will be deleted as well. Deletion of child jobs directly is not allowed. (required)
+  projectId: string, Required. Project ID of the job for which metadata is to be deleted. (required)
+  jobId: string, Required. Job ID of the job for which metadata is to be deleted. If this is a parent job which has child jobs, the metadata from all child jobs will be deleted as well. Direct deletion of the metadata of child jobs is not allowed. (required)
   location: string, The geographic location of the job. Required. See details at: https://cloud.google.com/bigquery/docs/locations#specifying_your_location.
 </pre>
 </div>