rest api: query vertices&edges with multi properties by paging

[javeme]

implemented: #658
Change-Id: Ic803bc5d11bbd77d8d2b8b7c3cc247cdd5d7781e

[codecov]

Codecov Report

Merging #759 into master will increase coverage by 0.02%.
The diff coverage is 66.66%.

@@             Coverage Diff             @@
##             master    #759      +/-   ##
===========================================
+ Coverage     71.27%   71.3%   +0.02%     
  Complexity     4345    4345              
===========================================
  Files           281     281              
  Lines         20764   20761       -3     
  Branches       2925    2923       -2     
===========================================
+ Hits          14800   14804       +4     
+ Misses         4513    4508       -5     
+ Partials       1451    1449       -2

Impacted Files	Coverage Δ	Complexity Δ
.../java/com/baidu/hugegraph/api/graph/VertexAPI.java	35.76% <ø> (+0.23%)	0 <0> (ø)	⬇️
...om/baidu/hugegraph/backend/query/QueryResults.java	87.14% <ø> (ø)	33 <0> (ø)	⬇️
...in/java/com/baidu/hugegraph/api/graph/EdgeAPI.java	29.21% <0%> (+0.16%)	0 <0> (ø)	⬇️
...du/hugegraph/traversal/optimize/TraversalUtil.java	66.89% <100%> (ø)	82 <0> (ø)	⬇️
...du/hugegraph/traversal/optimize/HugeGraphStep.java	80% <100%> (ø)	19 <0> (ø)	⬇️
...u/hugegraph/traversal/optimize/HugeVertexStep.java	72.46% <100%> (ø)	18 <0> (ø)	⬇️
...api/src/main/java/com/baidu/hugegraph/api/API.java	50.57% <50%> (-0.57%)	0 <0> (ø)
...du/hugegraph/backend/tx/GraphIndexTransaction.java	80.97% <0%> (+0.39%)	179% <0%> (ø)	⬇️
...a/com/baidu/hugegraph/backend/query/Condition.java	78.42% <0%> (+0.82%)	31% <0%> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 96afae1...18ffa3f. Read the comment docs.