vendor: update all dependencies

* Update all dependencies
  * Remove all `[[constraint]]` from Gopkg.toml
  * Add in the minimum number of `[[override]]` to build
  * Remove go get of github.com/inconshreveable/mousetrap as it is vendored
  * Update docs with new policy on constraints

vendor/cloud.google.com/go/bigquery/query.go

@@ -17,6 +17,7 @@ package bigquery
 import (
 	"errors"
 
+	"cloud.google.com/go/internal/trace"
 	"golang.org/x/net/context"
 	bq "google.golang.org/api/bigquery/v2"
 )
@@ -260,12 +261,15 @@ func (c *Client) Query(q string) *Query {
 }
 
 // Run initiates a query job.
-func (q *Query) Run(ctx context.Context) (*Job, error) {
+func (q *Query) Run(ctx context.Context) (j *Job, err error) {
+	ctx = trace.StartSpan(ctx, "cloud.google.com/go/bigquery.Query.Run")
+	defer func() { trace.EndSpan(ctx, err) }()
+
 	job, err := q.newJob()
 	if err != nil {
 		return nil, err
 	}
-	j, err := q.client.insertJob(ctx, job, nil)
+	j, err = q.client.insertJob(ctx, job, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -278,7 +282,7 @@ func (q *Query) newJob() (*bq.Job, error) {
 		return nil, err
 	}
 	return &bq.Job{
-		JobReference:  q.JobIDConfig.createJobRef(q.client.projectID),
+		JobReference:  q.JobIDConfig.createJobRef(q.client),
 		Configuration: config,
 	}, nil
 }