default move selector from code

gistfile1.java

java.lang.NullPointerException
	at org.optaplanner.core.config.localsearch.LocalSearchPhaseConfig.buildMoveSelector(LocalSearchPhaseConfig.java:230)
	at org.optaplanner.core.config.localsearch.LocalSearchPhaseConfig.buildDecider(LocalSearchPhaseConfig.java:129)
	at org.optaplanner.core.config.localsearch.LocalSearchPhaseConfig.buildPhase(LocalSearchPhaseConfig.java:114)
	at org.optaplanner.core.config.localsearch.LocalSearchPhaseConfig.buildPhase(LocalSearchPhaseConfig.java:57)
	at org.optaplanner.core.config.solver.SolverConfig.buildPhaseList(SolverConfig.java:251)
	at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:184)
	at org.optaplanner.examples.common.integration.SolverConfigCombinationsTest.defaultMoveSelectorWithMultipleVariables(SolverConfigCombinationsTest.java:56)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)