Fix of NPE in Frame.toString()
One more domain adaptation test.

The test verifies correct ordering of columns.
Merge branch 'master' of github.com:0xdata/h2o

Conflicts:
	src/main/java/water/fvec/Frame.java
Model.adapt modified given dataset if response column was
not the last column.
Small change to beat Kevin's fetch clazz error.
Switch log level to LOG for selected packages.
Added a new model adapt test.

Objective is to verify different position
of the response column.
remove redundant files
Appended OS version and Java version into logs.
Merge branch 'master' of github.com:0xdata/h2o
Stupid mistake causing modification of validation dataset.

During scoring we created a new frame - clone list of columns but
referenced original cols names. Then we modified the new
frame which caused modification of original frame.