Cate Desktop reuses service started by another user

[forman]

Expected behavior

When Cate Desktop is launched, a new Cate WebAPI service instance should be created for every registered user in the OS.

Actual behavior

Cate Desktop will reuse any running Cate WebAPI service even of another user, because it connects to localhost:<port>. It even connects, although the Cate WebAPI service may be incompatible with the required version.

Steps to reproduce the problem

1. Log in as user 1
2. Start Cate Desktop 2.0.0.dev1
3. Log in as user 2
4. Start Cate Desktop 2.0.0.dev7

--> Cate Desktop 2.0.0.dev7 for user 2 will start and reuse Cate WebAPI 2.0.0.dev1 from user 1.

Specifications

Cate Desktop 1.0 to 2.0.0.dev7

[forman]

How to fix:

• Cate WebAPI service to report Cate Core version
• Cate Desktop to only reuse running service with compatible version
• Find free port

[forman]

Should be fixed in 2.0.0.dev9