SNMP Agent plugin:

SNMP Agent plugin:
  1. Removed redundant code in scalar and table column config parsing.
  2. Removed redundant code in snmp_agent_dump_data function.
  3. Changed function names:
       snmp_agent_config_data() -> snmp_agent_config_scalar()
       snmp_agent_config_table_data() -> snmp_agent_config_table_column()
       snmp_agent_dump_data() -> snmp_agent_dump_config()
  4. Fix: error getting SizeOID

Change-Id: I17175218119bcab979daff02deef298a57c93465
Signed-off-by: Mozejko, MarcinX <marcinx.mozejko@intel.com>