add option query.optimize_aggregate_by_index(set default false)

[javeme]

Change-Id: I8c614b578e1591002d8a36dd618445265c6e37ec

[codecov]

Codecov Report

Merging #1549 (89499c3) into master (5df904b) will decrease coverage by 0.03%.
The diff coverage is 88.00%.

@@             Coverage Diff              @@
##             master    #1549      +/-   ##
============================================
- Coverage     60.34%   60.31%   -0.04%     
+ Complexity     6393     6391       -2     
============================================
  Files           417      417              
  Lines         34289    34296       +7     
  Branches       4735     4736       +1     
============================================
- Hits          20693    20686       -7     
- Misses        11460    11475      +15     
+ Partials       2136     2135       -1     

Impacted Files	Coverage Δ
...du/hugegraph/backend/store/BackendSessionPool.java	80.55% <ø> (ø)
...m/baidu/hugegraph/backend/tx/GraphTransaction.java	79.74% <75.00%> (-0.03%)	⬇️
...n/java/com/baidu/hugegraph/config/CoreOptions.java	99.46% <100.00%> (+<0.01%)	⬆️
...va/com/baidu/hugegraph/auth/HugeAuthenticator.java	34.78% <0.00%> (-5.44%)	⬇️
...in/java/com/baidu/hugegraph/auth/HugeResource.java	77.92% <0.00%> (-1.30%)	⬇️
.../java/com/baidu/hugegraph/auth/RolePermission.java	90.58% <0.00%> (-1.18%)	⬇️
...c/main/java/com/baidu/hugegraph/task/HugeTask.java	72.00% <0.00%> (-0.31%)	⬇️
...du/hugegraph/backend/tx/GraphIndexTransaction.java	82.25% <0.00%> (+0.10%)	⬆️

---

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 5df904b...89499c3. Read the comment docs.