Supply GBM response name in log

Also fix GBMTest
Merge branch 'master' of github.com:0xdata/h2o
Comment about the lock-down on what 'cols' means
Merge branch 'master' of github.com:0xdata/h2o
Better comment
bugfix for build.sh
Merge branch 'master' of github.com:0xdata/h2o
test_slice_fail_1161.py is for hex-1161 (simplification of test_rf_covtype_train_oobe2.py and ..oobe3.py fails.
I reduced the tree depth on test_rf_big_rand_tree.py to avoid GC/out of memory for the 7 gb heaps used.
Merge branch 'master' of github.com:0xdata/h2o
two variants for hex-1161 (exec slice issue)
More GBM classification-vs-regression work

Start pushing regression thru SharedTreeModelBuilder
Merge branch 'master' of github.com:0xdata/h2o
add info for hdfs_version and hdfs_name node to the find_cloud so the different runners and python tests will import hdfs correctly...also added expected_size to find_cloud.py to check the cloud is sane before doing tests
Push regression GBM thru to 1st results
Merge branch 'master' of github.com:0xdata/h2o
kill_all* ..do what it says. the others, remove unnecessary line
do the maprfs test first so we can see if it works better on jenkins now
don't do RF (one of the datasets has reals..just turn off RF for now)
Run a regression GBM
Merge branch 'master' of github.com:0xdata/h2o