Created Unassigned: Make ObjectStore to inherit from IObjectStore [7286]

Make ObjectStore inherit from an Interface: IObjectStore, in order to allow customization of the ObjectStore:
https://sharpsnmplib.codeplex.com/SourceControl/latest#SharpSnmpLib/Pipeline/ObjectStore.cs

This is necessary for applications which do not necessarly know all OID's managed by the SNMP Server. The Current Implementation requires knowledge of all OID's on startup/before requesting the Object.

public interface IObjectStore{
public ScalarObject GetObject(ObjectIdentifier id);
public ScalarObject GetNextObject(ObjectIdentifier id);
public void Add(ISnmpObject newObject);
}