Deprecate BaseTempestTestCase.create_and_associate_floatingip method

Add new 'debtcollector' dependency with the purpose of deprecating methods
that are going to be removed.

Mark BaseTempestTestCase.create_and_associate_floatingip for removal.

Replace create_and_associate_floatingip with create_floatingip in
BaseTempestTestCase class.

Change-Id: I5c5fd143a5cb4e138c46d13445f8225444bd2f58
diff --git a/releasenotes/notes/mark-methods-removals-f8b230171c045a3e.yaml b/releasenotes/notes/mark-methods-removals-f8b230171c045a3e.yaml
new file mode 100644
index 0000000..ab9f37a
--- /dev/null
+++ b/releasenotes/notes/mark-methods-removals-f8b230171c045a3e.yaml
@@ -0,0 +1,11 @@
+---
+
+features:
+  - |
+    Add new 'debtcollector' dependency with the purpose of deprecating methods
+    that are going to be removed.
+
+deprecations:
+  - |
+    Deprecate method BaseTempestTestCase.create_and_associate_floatingip after
+    replacing it with method BaseNetworkTest.create_floatingip.