add local plugins first when processing playbook directories

playbooks (tests are considered playbooks) may have local modules
and other plugins.  Process these first before processing the playbooks.
Then, process possible role directories under the playbook directory,
but do not treat it as a "real" role directory.

report-modules-plugins.py

@@ -565,11 +565,13 @@ def process_role_meta_path(meta_path, ctx):
 
 
 def process_playbooks_path(playbooks_path, ctx):
+    # see if there are any local plugins first
+    ctx.add_local_plugins(playbooks_path, "library")
+    ctx.add_local_plugins(playbooks_path, "filter_plugins")
     for _, itempath in os_listdir(playbooks_path):
         if os.path.isfile(itempath):
             process_ansible_file(itempath, ctx)
-    # treat it like a role - look for vars/, tasks/, etc.
-    process_role(playbooks_path, True, ctx)
+    process_role(playbooks_path, False, ctx)
 
 
 def process_role_tests_path(tests_path, ctx):