fix checkstyle IdHolder&AuthManager issue

[seagle-yuan]

relate to #1835
fix checkstyle issue

com.baidu.hugegraph.backend.page.IdHolder delete extra semicolons
com.baidu.hugegraph.auth.AuthManager add empty line and delete "public" word

[codecov]

Codecov Report

Merging #1846 (6461465) into master (b991b6a) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1846      +/-   ##
============================================
- Coverage     70.81%   70.78%   -0.04%     
+ Complexity      982      693     -289     
============================================
  Files           447      447              
  Lines         38040    38040              
  Branches       5389     5389              
============================================
- Hits          26938    26925      -13     
- Misses         8469     8484      +15     
+ Partials       2633     2631       -2     

Impacted Files	Coverage Δ
...ava/com/baidu/hugegraph/backend/page/IdHolder.java	80.85% <100.00%> (ø)
...baidu/hugegraph/backend/store/raft/RaftResult.java	81.25% <0.00%> (-18.75%)	⬇️
...aidu/hugegraph/backend/store/raft/RaftClosure.java	44.82% <0.00%> (-17.25%)	⬇️
...hugegraph/backend/store/raft/RaftBackendStore.java	75.00% <0.00%> (-6.53%)	⬇️
...m/baidu/hugegraph/backend/store/raft/RaftNode.java	47.65% <0.00%> (-4.70%)	⬇️
...va/com/baidu/hugegraph/task/ServerInfoManager.java	76.75% <0.00%> (-3.25%)	⬇️
...hugegraph/backend/store/raft/rpc/RaftRequests.java	27.92% <0.00%> (+0.06%)	⬆️
...va/com/baidu/hugegraph/util/collection/IntSet.java	75.00% <0.00%> (+1.27%)	⬆️
.../hugegraph/backend/store/rocksdb/RocksDBStore.java	69.71% <0.00%> (+1.52%)	⬆️
...ugegraph/backend/store/raft/StoreStateMachine.java	65.17% <0.00%> (+1.78%)	⬆️

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[seagle-yuan]

It seems like the probability of failure is hign

Error:  Failures: 
Error:    EdgeApiTest>BaseApiTest.init:82->BaseApiTest.clearData:600->BaseApiTest.clearSchema:541->BaseApiTest.lambda$clearSchema$5:520->BaseApiTest.assertResponseStatus:617 Response with status 400 and content {"exception":"class com.baidu.hugegraph.HugeException","message":"Failed to serialize indexlabels","cause":"com.baidu.hugegraph.HugeException: Can't write json: Undefined vertex label with id: '24' (through reference chain: java.util.ArrayList[0])"} expected:<200> but was:<400>
Error:    GremlinApiTest>BaseApiTest.init:82->BaseApiTest.clearData:600->BaseApiTest.clearSchema:541->BaseApiTest.lambda$clearSchema$5:520->BaseApiTest.assertResponseStatus:617 Response with status 400 and content {"exception":"class com.baidu.hugegraph.HugeException","message":"Failed to serialize indexlabels","cause":"com.baidu.hugegraph.HugeException: Can't write json: Undefined vertex label with id: '24' (through reference chain: java.util.ArrayList[0])"} expected:<200> but was:<400>
Error:  com.baidu.hugegraph.api.IndexLabelApiTest.testDelete(com.baidu.hugegraph.api.IndexLabelApiTest)
Error:    Run 1: IndexLabelApiTest.testDelete:149->BaseApiTest.assertResponseStatus:617 Response with status 400 and content {"exception":"class com.baidu.hugegraph.exception.ExistedException","message":"The index label 'personByAge' has existed","cause":""} expected:<202> but was:<400>
Error:    Run 2: IndexLabelApiTest>BaseApiTest.teardown:92->BaseApiTest.clearData:600->BaseApiTest.clearSchema:541->BaseApiTest.lambda$clearSchema$5:520->BaseApiTest.assertResponseStatus:617 Response with status 400 and content {"exception":"class com.baidu.hugegraph.HugeException","message":"Failed to serialize indexlabels","cause":"com.baidu.hugegraph.HugeException: Can't write json: Undefined vertex label with id: '24' (through reference chain: java.util.ArrayList[0])"} expected:<200> but was:<400>

[imbajin]

maybe we could unify all interface (remove public static?)