Fix the logging of request body credentials

Recently we moved the logging of request from rest_client's
request() to raw_request which end up logging the credentials
also from Token client request.

This is to add a kwargs in raw_request() method which tell whether
request body needs to log or not. Also update Token clients to
pass '<omitted>' to stop logging the credential.

Change-Id: I7cbd3656463a51d18b4d72f45a324145283fc7eb
diff --git a/releasenotes/notes/fix-credential-logging-98089c897d801355.yaml b/releasenotes/notes/fix-credential-logging-98089c897d801355.yaml
new file mode 100644
index 0000000..e06e2e2
--- /dev/null
+++ b/releasenotes/notes/fix-credential-logging-98089c897d801355.yaml
@@ -0,0 +1,6 @@
+---
+security:
+  - |
+    Recently we moved the logging of API request in rest_client's
+    raw_request which end up logging the credentials also from
+    Token client request. This issue has been fixed now.