Only the IPv6 addresses must be enclosed in square brackets,
the IPv4 adresses and hostname can't be enclosed.
Test plan:
Pass: Verify ptp-notification in IPv4 and IPv6 system.
Pass: Verify ptp-notification operations (pull status,
subscribe, list, delete)
Pass: Verify both ptp-notification V1 and V2 operations
Closes-bug: 2097136
Change-Id: I7792b2648bd609ca49fbec840eaf7e687ae25c7d
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>