INSTETC: move run metadata PVs to it #64

( follows on from #62 )

I would like it to be easier to add new software to control data acquisition hardware in the future.

As such we should move some PVs from the ISISICP/ISISDAE to INSTETC such as:
RBNUMBER
TITLE
_USERNAME

(any others?)

these probably all want to be autosaved.

this will need to be done for HRPD-X.