Support Affiliate Relationships between Agents

[RaggedStaff]

As a platform I need to track linkages between Agents to enable me to correctly manage Agent relationships.

I require the ability to create an isAffiliated link between:

1. Enterprise and Person
2. Enterprise and Enterprise

The Person to Enterprise and Person to Person linkages are deemed invalid.

Acceptance Criteria

• [x] An isAffiliated relationship between a Person or Enterprise and an Enterprise can be created
• [x] An inverse relationship hasAffiliate also exists.
• [x] An isAffilated relationship between Person and Enterprise or Person cannot be created

[Alcoz]

This issue has been fixed in v1.10.0 with affiliated and affiliatedTo properties