Subnet Identities

[JohnReedV]

Description

Adds subnet Identities

Done:

• Define subnet identity structs and storage items.
• Add extrinsic set_subnet_identity.
• Add the subnet identity fields to SubnetInfo.
• Remove the identity when the subnet is dissolved.
• Write unit tests
• Integrate identities into subnet registration process

Todo:

• Test Manually

Related Issue(s)

• Closes #708

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update
• [ ] Other (please describe):

Breaking Change

• The extrinsic user_add_network now takes a second parameter identity: Option<SubnetIdentityOf>
• SubnetInfo has a new parameter identity: Option<SubnetIdentity>.