Moderate: net-snmp security and bug fix update (Oracle Linux 7)

[1:5.7.2-24]
- Fixed lmSensorsTable not reporting sensors with duplicate names
(#1252053)
- Fixed close() overhead of extend commands (#1252048)
- Fixed out-of-bounds write in python code (#1252034)

[1:5.7.2-23]
- Fixed parsing of invalid variables in incoming packets (#1248414)
- Fixed HOST-RESOURCES-MIB::hrFSAccess flag when read-only filesystem
becomes writable (#1241897)

[1:5.7.2-22]
- Fixed IP-MIB::ipSystemStatsInOctets and similar counters for IPv4
(#1235697)

[1:5.7.2-21]
- Fixed crash on reloading 'exec' configuration options (#1228893)
- Fixed CVE-2014-3565, snmptrapd died when parsing certain traps (#1209361)
- Fixed storageUseNFS functionality in hrStorageTable (#1193006)
- Fixed forwarding of traps with RequestID=0 in snmptrapd (#1192511)
- Fixed hrStorageTable to contain 31 bits integers (#1192221)
- Fixed 'clientaddr' option for UDPv6 client messages (#1190679)
- Fixed log level of SMUX messages (#1189393)
- Fixed UDP-MIB::udpTable index on big-endian platforms (#1184433)
- Fixed client utilities reporting 'read_config_store open failure on
/var/lib/net-snmp/snmpapp.conf' (#1151310)
- Fixed snmpd crash when failed to parse SMUX message headers (#1140236)
- Added 'diskio' option to snmpd.conf, it's possible to monitor only
selected devices in diskIOTable (#1092308)