Refactoring hardware-inventory

1) Fixing compareTo on OnmsHwEntity to avoid issues when using SortedSet
instead of List for children and custom attributes.

2) Renaming the project to opennms-snmp-hardware-inventory-provisioning-adapter

3) Renaming the adapter class to SnmpHardwareInventoryProvisioningAdapter

4) Renaming the configuration class to SnmpHwInventoryAdapterConfigDao

Tested with a Cisco lab.