added plugin which prepare keys for ExplicitCleanUp plugin

openpype/plugins/publish/collect_cleanup_keys.py

@@ -0,0 +1,21 @@
+"""
+Requires:
+    None
+Provides:
+    context
+        - cleanupFullPaths (list)
+        - cleanupEmptyDirs (list)
+"""
+
+import pyblish.api
+
+
+class CollectCleanupKeys(pyblish.api.ContextPlugin):
+    """Prepare keys for 'ExplicitCleanUp' plugin."""
+
+    label = "Collect Cleanup Keys"
+    order = pyblish.api.CollectorOrder
+
+    def process(self, context):
+        context.data["cleanupFullPaths"] = []
+        context.data["cleanupEmptyDirs"] = []