unicens initialisation does not protect the required sequencing

The required sequence for Unicens is as follow.

• MOST driver must be loaded
• /usr/bin/unicens-config.sh must be finished
  There is a fix pending (Soya-San found), but it is only related to UnshieldedTwistedPair(UTP)-Setup
• require alsa-core (for HalServiceInit()) 
• requires API "agl-service-unicens" started (setting up the network)

The execution of /usr/bin/unicens-config.sh is done in the service
/lib/systemd/system/unicens-config.service,

But the other Unicens startup process do not wait on this service to be finish before going on.

4a will only start after afm-api-ws-unicens@%i.socket, so a dependency in afm-api-ws-unicens@%i.socket must be added to wait for  /usr/bin/unicens-config.sh to complete.