Remove Project.is_active attribute.

[eoyilmaz]

User Story

As a developer using Stalker I want to convert the Project.is_active attribute from being a column in the database to a property returning if the Project.status is Complete/CMPL or not to make it lean and remove confusion.

Acceptance Criteria

• 1. Remove the is_active column definition from the Project class.
• 2. Add an Alembic migration script for this.
• 3. Add a new is_active predicate property that returns if the Project.status is Status=Complete/CMPL which is one of the default statuses created by Stalker configurations.

Notes

This attribute has never been used since it is ever introduced, the status "Complete/CMPL" does the job beautifully, so remove the is_active attribute.