fix(initMessage): don't send a ready message if source has already been set up

[hereismass]

PR Title

Description

All is in the title. We don't send 'app_ready' more than once.

Submission

• [x] Your branch is based on master
• [x] Your code is unit tested
• [x] CircleCI builds are green (coverage and lint)
• [x] Add team "CTI" as "Reviewer" for the PR
• [x] Name your PR with the convention fix|feat|impr(<subject>): description.

[hereismass]

nevermind, does not work as intended