PNS SNMP Changes related to SecurityClass1

This epic collects all issues related to changed SNMP behavior of PNS starting with PNS V4.7.0.0 and PNS V5.5.0.0

The main change is that activation of SecurityClass 1 shall lead to special "ResetFactory" behavior.

If SecurityClass 1 is NOT enabled, nothing shall change. This means:

• SNMP is always enabled and active and uses default CommunityStrings
• record object CIMSNMPAdjust (index 0x8200) is NOT supported and shall be rejected with "Invalid index"

However, if SecurityClass1 is enabled, the following behavior is expected:

• Factory default leads to SNMP completely disabled
• first established IO AR  NOT  writing object CIMSNMPAdjust (index 0x8200) will automatically enable SNMP with default settings and community strings
• recod object CIMSNMPAdjust (index 0x8200) shall be supported and respected (in case written by an AR)
• Receiving a ResetFactorySettings Mode 2, 3, 4, 8, 9 shall set content of CIMSNMPAdjust to NULL, thus disable SNMP

Please refer to MU3 Specification:

• Profile document, statement "Devices supporting CIMSNMPAdjust according to Table 71 shall support the out of the box default according to Table 70. " plus Table 71 – CIMSNMPAdjust and Table 70 – Recommended out of the box default
• Protocol document, Table 91 – Meaning of the different ResetToFactory modes