tests: fix `wait_for_*` methods, force mnsync on non-mns too (#4782)
tests: fix `wait_for_*` methods, force mnsync on non-mns too (#4782)

* tests: fix `wait_for_*` methods

should not override `all_ok` once it's `False`

* tests: force non-mns to switch to "fully synced" mnsync status in `setup_network`

like we do this for the controller node and all mns already
UdjinM6/dash,dashpay/dash,thelazier/dash,thelazier/dash,dashpay/dash,UdjinM6/dash,dashpay/dash,thelazier/dash,UdjinM6/dash,thelazier/dash,UdjinM6/dash,UdjinM6/dash,thelazier/dash,dashpay/dash,dashpay/dash