add multichain provider in addition to existing providers

[alexcos20]

In current main, we can run 2 providers.

This PR adds an additional provider (ip: 172.15.0.104), running the multichain version, but sharing the same private key with provider1.

This will help us to test the backwards compatibility by doing a test:

• publish assets using 172.15.0.4 (provider1) as serviceEndpoint
• update metadata, and change serviceEndpoint to point to 172.15.0.104 (multichain provider)
• test consume

[trentmc]

@alexcos20 I think this PR is now obsolete because Provider is always multichain. Right? If yes, then we can close the PR and delete the branch (dual_provider_version)