Add seucity report tab to pipeline page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/projects/pipelines_controller.rb

 class Projects::PipelinesController < Projects::ApplicationController
   before_action :whitelist_query_limiting, only: [:create, :retry]
   before_action :pipeline, except: [:index, :new, :create, :charts]
-  before_action :commit, only: [:show, :builds, :failures]
+  before_action :commit, only: [:show, :builds, :failures, :security]
   before_action :authorize_read_pipeline!
   before_action :authorize_create_pipeline!, only: [:new, :create]
   before_action :authorize_update_pipeline!, only: [:retry, :cancel]
@@ -83,7 +83,11 @@ class Projects::PipelinesController < Projects::ApplicationController
   end
 
   def builds
-    render_show
+    if @pipeline.sast_artifact
+      render_show
+    else
+      redirect_to pipeline_path(@pipeline)
+    end
   end
 
   def failures

app/views/projects/pipelines/_with_tabs.html.haml

 - failed_builds = @pipeline.statuses.latest.failed
+- sast_artifact = @pipeline.sast_artifact
 
 .tabs-holder
   %ul.pipelines-tabs.nav-links.no-top.no-bottom.mobile-separator
@@ -14,7 +15,7 @@
         = link_to failures_project_pipeline_path(@project, @pipeline), data: {target: 'div#js-tab-failures', action: 'failures', toggle: 'tab' }, class: 'failures-tab' do
           Failed Jobs
           %span.badge.js-failures-counter= failed_builds.count
-    - if pipeline.sast_artifact
+    - if sast_artifact
       %li.js-security-tab-link
         = link_to security_project_pipeline_path(@project, @pipeline), data: {target: 'div#js-tab-security', action: 'security', toggle: 'tab' }, class: 'security-tab' do
           Security Report
@@ -57,3 +58,6 @@
           %span.build-name
             = link_to build.name, pipeline_job_url(pipeline, build)
         %pre.build-log= build_summary(build, skip: index >= 10)
+  - if sast_artifact
+    #js-tab-security.build-security.tab-pane
+      %h1 PUT SECURITY REPORT HERE