Removal of re injector from spinnMan and into FEC

[alan-stokes]

this allows us to then insert the data gathering components into extra monitors cores.

depends upon:

• [ ] https://github.com/SpiNNakerManchester/SpiNNFrontEndCommon/pull/214
• [ ] https://github.com/SpiNNakerManchester/sPyNNaker/pull/427
• [ ] https://github.com/SpiNNakerManchester/SpiNNakerGraphFrontEnd/pull/70
• [ ] https://github.com/SpiNNakerManchester/SpiNNFrontEndCommon/pull/215
• [ ] https://github.com/SpiNNakerManchester/SpiNNMan/pull/97