L1t updates 730 plus hlt (aka #6468 rebased)

Original message in  #6468

>This includes the PR #6462 in addtion to the l1t updates for 730 in #6450. It removes our incorrect changes >to HLT configs (but leaves the customization) It supercedes #6450. Send PR now, but runTheMatrix tests >are still underway.

Having smaller PRs, rebased rather than merged, would simplify your job, BTW.