more cleanup and event handling
NMS-5741: better duty schedule editor default

* update default end time to 2359
* validate schedule durations; warn when 5 minutes or less
* redirect back to modifyUser after validation failures
NMS-5776 make sure we have matching getter/setters, monitored service count is a no-op
void, not int :)
Revert "void, not int :)"

This reverts commit 3586edc8b848c955a768cd27350cf6ed71cd1ba6.
Revert "NMS-5776 make sure we have matching getter/setters, monitored service count is a no-op"

This reverts commit f74bfd5c76f67b5eddb4c5edbc5a30ec4c72559c.
Enhancement work for NMS-5423

Enable the SNMP code to digest OCTET STRING values acting as proto-Counter64
objects as seen in the FCMGMT-MIB with the following comment:

-- There is one and only one statistics table for each
-- individual port. For all objects in statistics table, if the object is not
-- supported by the conn unit then the high order bit is set to 1 with all other
-- bits set to zero. The high order bit is reserved to indicate if the object
-- if supported or not. All objects start at a value of zero at hardware
-- initialization and continue incrementing till end of 63 bits and then
-- wrap to zero.