Start outlining the unittests for manager (#7852)
Start outlining the unittests for manager (#7852)

This should be split up into further blocks

Karthikeyan-kkk/ooni-probe,kdmurray91/ooni-probe,lordappsec/ooni-probe,juga0/ooni-probe,kdmurray91/ooni-probe,juga0/ooni-probe,lordappsec/ooni-probe,kdmurray91/ooni-probe,0xPoly/ooni-probe,0xPoly/ooni-probe,Karthikeyan-kkk/ooni-probe,kdmurray91/ooni-probe,juga0/ooni-probe,lordappsec/ooni-probe,lordappsec/ooni-probe,Karthikeyan-kkk/ooni-probe,0xPoly/ooni-probe,Karthikeyan-kkk/ooni-probe,juga0/ooni-probe,0xPoly/ooni-probe