GLM2 fix: when unlocking xval models, only unlock them for one sub model as the same xval model is shared!
GLM2 update: bail out immediately if no valid lambda (i.e. < lambda_max) was supplied.
Merge branch 'tomas-parse' of github.com:0xdata/h2o into tomas-parse
Multiple glm2 fixed made to make Arno's random glm test to pass.
Most notably: fixed the cleanup in case of error recovery and changed GLMGrid to have separate job for each alpha value.
Added try{}catch(Ex){rethrow(ex);} to RPC,Futures and MRTask2 to preserve the stack trace in case of failure (so we don't get meaningless inner failure with no information on where it was called from).