support clone graph without config param

[javeme]

Change-Id: I290cf7f51cf92a082a94d60b15638ae699a18515

[codecov]

Codecov Report

Merging #1709 (82cdc9b) into master (b6abf96) will increase coverage by 17.00%.
The diff coverage is 6.34%.

@@              Coverage Diff              @@
##             master    #1709       +/-   ##
=============================================
+ Coverage     49.53%   66.53%   +17.00%     
- Complexity     5350     7082     +1732     
=============================================
  Files           423      423               
  Lines         35488    35525       +37     
  Branches       4948     4946        -2     
=============================================
+ Hits          17580    23638     +6058     
+ Misses        15975     9501     -6474     
- Partials       1933     2386      +453     

Impacted Files	Coverage Δ
...ava/com/baidu/hugegraph/api/profile/GraphsAPI.java	10.76% <0.00%> (+10.76%)	⬆️
...com/baidu/hugegraph/auth/ContextGremlinServer.java	32.25% <0.00%> (+32.25%)	⬆️
...a/com/baidu/hugegraph/auth/HugeGraphAuthProxy.java	58.09% <0.00%> (+58.09%)	⬆️
...e/src/main/java/com/baidu/hugegraph/HugeGraph.java	65.30% <ø> (ø)
...in/java/com/baidu/hugegraph/StandardHugeGraph.java	66.43% <0.00%> (+1.07%)	⬆️
...ph/backend/store/AbstractBackendStoreProvider.java	79.78% <0.00%> (-1.54%)	⬇️
...h/backend/store/raft/RaftBackendStoreProvider.java	0.00% <0.00%> (ø)
...va/com/baidu/hugegraph/dist/HugeGremlinServer.java	52.38% <0.00%> (+52.38%)	⬆️
...ph/backend/store/rocksdb/RocksDBStoreProvider.java	31.57% <0.00%> (-68.43%)	⬇️
...in/java/com/baidu/hugegraph/core/GraphManager.java	39.60% <8.19%> (+39.60%)	⬆️
... and 253 more

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[javeme]

unit test error:

Error:  Tests run: 390, Failures: 0, Errors: 1, Skipped: 1, Time elapsed: 720.896 s <<< FAILURE! - in com.baidu.hugegraph.unit.UnitTestSuite
Error:  testIntFixedSeConcurrent(com.baidu.hugegraph.unit.util.collection.IntSetTest)  Time elapsed: 14.524 s  <<< ERROR!
java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.AssertionError: expected:<10000> but was:<9999>
	at com.baidu.hugegraph.unit.util.collection.IntSetTest.testIntSetConcurrent(IntSetTest.java:145)
	at com.baidu.hugegraph.unit.util.collection.IntSetTest.testIntFixedSeConcurrent(IntSetTest.java:72)
Caused by: java.util.concurrent.ExecutionException: java.lang.AssertionError: expected:<10000> but was:<9999>
	at com.baidu.hugegraph.unit.util.collection.IntSetTest.testIntSetConcurrent(IntSetTest.java:145)
	at com.baidu.hugegraph.unit.util.collection.IntSetTest.testIntFixedSeConcurrent(IntSetTest.java:72)
Caused by: java.lang.AssertionError: expected:<10000> but was:<9999>
	at com.baidu.hugegraph.unit.util.collection.IntSetTest.lambda$testIntSetConcurrent$6(IntSetTest.java:152)