Feature 8840 Notify without auth and typo fixes

Initial implementation always needed auth to make notification.
After going through sol005, understanding is auth can be optional and while subscribing
auth is kept optional. Also fixed some typos.

Change-Id: I89c5cf8f0efa9915b4daebb0f8e0d20d2861f71c
Signed-off-by: K Sai Kiran <saikiran.k@tataelxsi.co.in>