4.x: investigate and fix why DefaultLoadBalancingPolicyIT.should_apply_node_filter is failing

[dkropachev]

It randomly fails:

Error:  Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 15.755 s <<< FAILURE! - in com.datastax.oss.driver.core.loadbalancing.DefaultLoadBalancingPolicyIT
Error:  com.datastax.oss.driver.core.loadbalancing.DefaultLoadBalancingPolicyIT.should_apply_node_filter  Time elapsed: 0.028 s  <<< FAILURE!
org.junit.ComparisonFailure: expected:<[0]> but was:<[1]>
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at com.datastax.oss.driver.core.loadbalancing.DefaultLoadBalancingPolicyIT.lambda$should_apply_node_filter$4(DefaultLoadBalancingPolicyIT.java:296)
	at com.datastax.oss.driver.core.loadbalancing.DefaultLoadBalancingPolicyIT.should_apply_node_filter(DefaultLoadBalancingPolicyIT.java:294)