optimize list property read

[javeme]

Change-Id: I621e5cb441f48c961ffc5ea78a83d5428238c4c2

[codecov]

Codecov Report

Merging #943 into master will increase coverage by 0.01%.
The diff coverage is 84.37%.

@@             Coverage Diff              @@
##             master     #943      +/-   ##
============================================
+ Coverage     71.93%   71.95%   +0.01%     
- Complexity     4676     4679       +3     
============================================
  Files           298      298              
  Lines         22330    22339       +9     
  Branches       3162     3165       +3     
============================================
+ Hits          16063    16073      +10     
  Misses         4700     4700              
+ Partials       1567     1566       -1     

Impacted Files	Coverage Δ	Complexity Δ
...m/baidu/hugegraph/backend/cache/AbstractCache.java	69.38% <33.33%> (ø)	28.00 <9.00> (ø)
...n/java/com/baidu/hugegraph/schema/PropertyKey.java	83.00% <75.00%> (-0.84%)	45.00 <0.00> (ø)
...a/com/baidu/hugegraph/backend/query/Condition.java	79.67% <100.00%> (+0.83%)	31.00 <0.00> (ø)
.../java/com/baidu/hugegraph/backend/query/Query.java	84.72% <100.00%> (ø)	93.00 <0.00> (ø)
...hugegraph/backend/serializer/BinarySerializer.java	83.19% <100.00%> (-0.06%)	106.00 <0.00> (-1.00)
...n/java/com/baidu/hugegraph/structure/HugeEdge.java	74.13% <100.00%> (+0.14%)	75.00 <0.00> (+1.00)
...ava/com/baidu/hugegraph/structure/HugeElement.java	70.37% <100.00%> (+0.75%)	57.00 <0.00> (+2.00)
...n/java/com/baidu/hugegraph/task/TaskScheduler.java	83.14% <0.00%> (-0.38%)	62.00% <0.00%> (ø%)
...du/hugegraph/backend/tx/GraphIndexTransaction.java	79.58% <0.00%> (+0.12%)	186.00% <0.00%> (ø%)
...c/main/java/com/baidu/hugegraph/task/HugeTask.java	71.53% <0.00%> (+0.36%)	66.00% <0.00%> (+1.00%)
... and 1 more

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[zhoney]

false