Fix NTPProtocolEnabled property path in error message

Corrected the property path reported in error messages:
Managers/NetworkProtocol/NTPProcotolEnabled
Managers/NetworkProtocol/NTPProtocolEnabled

Change-Id: I560d9716e6fe3a64d5a09af4ab6b84bb744ee61f
Signed-off-by: Shivraj Toravi <shivrajnt@ami.com>