Boards and filters having project Id in JQL query instead of project keys do not function in cloud

Issue Summary

This is reproducible on Data Center: yes

There are two ways a board or filter can reference a project in its JQL query- 

1. Project id
2. Project key

When the JQL query contains project id(s) instead of project keys, it works fine in server. Whilst in cloud, the same board / filter doesn't function even when the project is present in cloud.

Steps to Reproduce

1. Create a project and a board for it. The board should have the project id in its JQL
2. Migrate the project. The board should also get migrated to cloud.

Expected Results

Board in cloud functions properly and has the same issues as it has in server.

Actual Results

Board doesn't function in cloud and fails to load the issues saying it cannot find the project.

Workaround

Before performing the migration, go through the boards and filters. And update their JQL queries to not have project id(s). If present, replace those project id(s) with the corresponding project key(s).