Drop single point model recovery (#6262)

* Pass rabit params in JVM package.
* Implement timeout using poll timeout parameter.
* Remove OOB data check.

tests/ci_build/approx.conf.in

@@ -1,12 +0,0 @@
-# Originally an example in demo/regression/
-tree_method=approx
-eta = 0.5 
-gamma = 1.0
-seed = 0
-min_child_weight = 0
-max_depth = 5 
-
-num_round = 12 
-save_period = 100 
-data = "demo/data/agaricus.txt.train"
-eval[test] = "demo/data/agaricus.txt.test"

tests/ci_build/runxgb.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-
-source activate cpu_test
-
-export DMLC_SUBMIT_CLUSTER=local
-
-submit="python3 dmlc-core/tracker/dmlc-submit"
-# build xgboost with librabit mock
-# define max worker retry with dmlc-core local num atempt
-# instrument worker failure with mock=xxxx
-# check if host recovered from expectected iteration
-echo "====== 1. Fault recovery distributed test ======"
-exec $submit --cluster=local --num-workers=10 --local-num-attempt=10 $1 $2 mock=0,10,1,0 mock=1,11,1,0 mock=1,11,1,1 mock=0,11,1,0 mock=4,11,1,0 mock=9,11,1,0 mock=8,11,2,0 mock=4,11,3,0 rabit_bootstrap_cache=1 rabit_debug=1