Adds placement trait api calls

Change-Id: I0c4523c6916821781c3a67b01ed2e0091407734e
diff --git a/releasenotes/notes/add-placement-traits-api-calls-087061f5455f0b12.yaml b/releasenotes/notes/add-placement-traits-api-calls-087061f5455f0b12.yaml
new file mode 100644
index 0000000..77d0b38
--- /dev/null
+++ b/releasenotes/notes/add-placement-traits-api-calls-087061f5455f0b12.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Adds API calls for traits in PlacementClient.