Set the GitLab access token first

It's always globally set so there's no reason not to set it first.
We need this for checking downstream pipeline when the project is
private like for security.

scripts/build_assets_image

 # Exit early if we don't want to build the image
 if [[ "${BUILD_ASSETS_IMAGE}" != "true" ]]
 then
-    exit 0
+  exit 0
 fi
 
 # Generate the image name based on the project this is being run in

scripts/trigger-build

@@ -26,6 +26,9 @@ module Trigger
 
   class Base
     def invoke!(post_comment: false, downstream_job_name: nil)
+      # gitlab-bot's token "GitLab multi-project pipeline polling"
+      Gitlab.private_token = access_token
+
       pipeline_variables = variables
 
       puts "Triggering downstream pipeline on #{downstream_project_path}"
@@ -40,7 +43,7 @@ module Trigger
       puts "Triggered downstream pipeline: #{pipeline.web_url}\n"
       puts "Waiting for downstream pipeline status"
 
-      Trigger::CommitComment.post!(pipeline, access_token) if post_comment
+      Trigger::CommitComment.post!(pipeline) if post_comment
       downstream_job =
         if downstream_job_name
           Gitlab.pipeline_jobs(downstream_project_path, pipeline.id).auto_paginate.find do |potential_job|
@@ -49,9 +52,9 @@ module Trigger
         end
 
       if downstream_job
-        Trigger::Job.new(downstream_project_path, downstream_job.id, access_token)
+        Trigger::Job.new(downstream_project_path, downstream_job.id)
       else
-        Trigger::Pipeline.new(downstream_project_path, pipeline.id, access_token)
+        Trigger::Pipeline.new(downstream_project_path, pipeline.id)
       end
     end
 
@@ -197,9 +200,7 @@ module Trigger
   end
 
   class CommitComment
-    def self.post!(downstream_pipeline, access_token)
-      Gitlab.private_token = access_token
-
+    def self.post!(downstream_pipeline)
       Gitlab.create_commit_comment(
         ENV['CI_PROJECT_PATH'],
         Trigger.non_empty_variable_value('CI_MERGE_REQUEST_SOURCE_BRANCH_SHA') || ENV['CI_COMMIT_SHA'],
@@ -214,7 +215,7 @@ module Trigger
     INTERVAL = 60 # seconds
     MAX_DURATION = 3600 * 3 # 3 hours
 
-    attr_reader :project, :id, :api_token
+    attr_reader :project, :id
 
     def self.unscoped_class_name
       name.split('::').last
@@ -224,14 +225,10 @@ module Trigger
       unscoped_class_name.downcase
     end
 
-    def initialize(project, id, api_token)
+    def initialize(project, id)
       @project = project
       @id = id
-      @api_token = api_token
       @start = Time.now.to_i
-
-      # gitlab-bot's token "GitLab multi-project pipeline polling"
-      Gitlab.private_token = api_token
     end
 
     def wait!