tempest: tempest run filters as templates (SOC-11052)

The tempest run filters employed by Crowbar are modeled
as static files instead of being generated at runtime as
chef templates. This makes it difficult to select which test
cases are enabled/disabled depending on which features and
options are actually configured.

This change re-models tempest run filters as templates.

(cherry picked from commit 8e1471a)

Author: stefannica

chef/cookbooks/tempest/recipes/config.rb

@@ -646,13 +646,38 @@
   )
 end
 
-remote_directory "#{node[:tempest][:tempest_path]}/run_filters/" do
-  source "run_filters"
-  action :create
-  recursive true
-end
-
 cookbook_file "#{node[:tempest][:tempest_path]}/bin/tests2skip.py" do
   source "tests2skip.py"
   mode 0755
 end
+
+# This is where tempest run filter templates are generated
+directory "#{node[:tempest][:tempest_path]}/run_filters" do
+  mode 0o755
+  action :create
+end
+
+# Get the Chef::CookbookVersion for this cookbook
+cb = run_context.cookbook_collection["tempest"]
+
+# Loop over the array of run filter template files
+cb.manifest["templates"].each do |cb_template|
+  # cb_template['name'] is relative to the default
+  # templates location, e.g.
+  #   'run_filters/foo.txt.erb'
+  filter_name = cb_template["name"].split(".erb")[0]
+
+  next unless filter_name =~ %r{run_filters\/.*txt}
+
+  template "#{node[:tempest][:tempest_path]}/#{filter_name}" do
+    mode 0o640
+    source "#{filter_name}.erb"
+    variables(
+      lazy do
+        {
+          enabled_services: enabled_services
+        }
+      end
+    )
+  end
+end