add a key named "ConfigurationManagementGraph" to the "graphs" property

Please help to have a look, thanks!
I've configured ConfigurationManagementGraph！But it still reported an error。
config:

my code is:
`
@Test
public void graphConfigurationShouldBeWhatWeExpectWhenUsingTemplateConfiguration()
throws Exception {

try {

JanusGraphManager gm;
Settings set =new Settings();
set.host="172.16.161.115";
gm = new JanusGraphManager(set);
final Map map = new HashMap<>();
map.put(STORAGE_BACKEND.toStringWithoutRoot(), "hbase");
map.put("storage.hostname", "172.16.161.115");
//ConfiguredGraphFactory.createTemplateConfiguration(new MapConfiguration(map));
ConfigurationManagementGraph instance = ConfigurationManagementGraph.getInstance();
final StandardJanusGraph graph = (StandardJanusGraph) ConfiguredGraphFactory.create("ghlml");
final StandardJanusGraph graph1 = (StandardJanusGraph) ConfiguredGraphFactory.open("ghlml");
instance.createTemplateConfiguration(new MapConfiguration(map));
Set graphNames = ConfiguredGraphFactory.getGraphNames();
for(String str:graphNames){
System.out.println("---"+str);
}
assertNotNull(graph);
assertEquals(graph, graph1);

assertEquals("ghlml", graph.getConfiguration().getConfiguration().get(GRAPH_NAME));
// assertEquals("inmemory", graph.getConfiguration().getConfiguration().get(STORAGE_BACKEND));

} finally {
//ConfiguredGraphFactory.removeConfiguration("graph1");
//ConfiguredGraphFactory.close("graph1");
}
}
`

error code:
`
org.janusgraph.graphdb.management.utils.ConfigurationManagementGraphNotEnabledException: Please add a key named "ConfigurationManagementGraph" to the "graphs" property in your YAML file and restart the server to be able to use the functionality of the ConfigurationManagementGraph class.
at org.janusgraph.graphdb.management.ConfigurationManagementGraph.getInstance(ConfigurationManagementGraph.java:97)
at pluradj.janusgraph.example.ConfiguredGraphFactoryTest.graphConfigurationShouldBeWhatWeExpectWhenUsingTemplateConfiguration(ConfiguredGraphFactoryTest.java:143)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

java.lang.RuntimeException: org.janusgraph.graphdb.management.utils.ConfigurationManagementGraphNotEnabledException: Please add a key named "ConfigurationManagementGraph" to the "graphs" property in your YAML file and restart the server to be able to use the functionality of the ConfigurationManagementGraph class.
at org.janusgraph.core.ConfiguredGraphFactory.getConfigGraphManagementInstance(ConfiguredGraphFactory.java:169)
at org.janusgraph.core.ConfiguredGraphFactory.removeTemplateConfiguration(ConfiguredGraphFactory.java:258)
at pluradj.janusgraph.example.ConfiguredGraphFactoryTest.cleanUp(ConfiguredGraphFactoryTest.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.janusgraph.graphdb.management.utils.ConfigurationManagementGraphNotEnabledException: Please add a key named "ConfigurationManagementGraph" to the "graphs" property in your YAML file and restart the server to be able to use the functionality of the ConfigurationManagementGraph class.
at org.janusgraph.graphdb.management.ConfigurationManagementGraph.getInstance(ConfigurationManagementGraph.java:97)
at org.janusgraph.core.ConfiguredGraphFactory.getConfigGraphManagementInstance(ConfiguredGraphFactory.java:167)
... 27 more

`

Start at ConfigurationManagementGraph.java:97 and ConfiguredGraphFactory.java:167-169, then inspect the YAML configuration shown in the issue and ConfiguredGraphFactoryTest.graphConfigurationShouldBeWhatWeExpectWhenUsingTemplateConfiguration. Reproduce the failure and verify that the ConfigurationManagementGraph exception no longer occurs when the graphs configuration is used.

Written by the indexing model from the issue text.