Put wavelength in ispyb earlier

[DominicOram]

For analysis zocalo reads the wavelength out of ispyb. We have seen a race condition where, because the wavelength is supplied during collection rather than before hand, zocalo sometimes falls over without finding one.

We should instead put what we think the wavelength will be in to ispyb pre collection then (optionally) update it later.

Acceptance Criteria

• A wavelength is put in ispyb before collection