fix travis-ci cannot find symbol Namifiable

[javeme]

fix #1363

Change-Id: I7b7ee43dfd92e1c54dc191f0ecba9557e02fa45b

[codecov]

Codecov Report

Merging #1376 (aadcbd9) into master (b4c767b) will decrease coverage by 6.82%.
The diff coverage is 41.94%.

@@             Coverage Diff              @@
##             master    #1376      +/-   ##
============================================
- Coverage     69.19%   62.36%   -6.83%     
- Complexity     5401     5826     +425     
============================================
  Files           328      385      +57     
  Lines         26334    31953    +5619     
  Branches       3750     4460     +710     
============================================
+ Hits          18222    19929    +1707     
- Misses         6333    10001    +3668     
- Partials       1779     2023     +244     

Impacted Files	Coverage Δ	Complexity Δ
...api/src/main/java/com/baidu/hugegraph/api/API.java	69.04% <ø> (+3.49%)	0.00 <0.00> (ø)
...n/java/com/baidu/hugegraph/api/auth/AccessAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...n/java/com/baidu/hugegraph/api/auth/BelongAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...in/java/com/baidu/hugegraph/api/auth/GroupAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...n/java/com/baidu/hugegraph/api/auth/TargetAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ain/java/com/baidu/hugegraph/api/auth/UserAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...com/baidu/hugegraph/api/gremlin/GremlinClient.java	90.90% <ø> (ø)	0.00 <0.00> (ø)
.../java/com/baidu/hugegraph/api/job/ComputerAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...va/com/baidu/hugegraph/api/metrics/MetricsAPI.java	65.78% <ø> (ø)	0.00 <0.00> (ø)
...ain/java/com/baidu/hugegraph/api/raft/RaftAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
... and 370 more

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