fix permission overflow from return results

[javeme]

also:
* hide private methods and fields for reflection that require permissions
* delete stale index of task directly

implement: #209
Change-Id: Iccfbd47c213e1e13122190d1242778031e8a957c

rebase and closed #956

[codecov]

Codecov Report

Merging #969 into master will decrease coverage by 0.44%.
The diff coverage is 61.87%.

@@             Coverage Diff              @@
##             master     #969      +/-   ##
============================================
- Coverage     71.42%   70.98%   -0.45%     
- Complexity     4887     5000     +113     
============================================
  Files           309      311       +2     
  Lines         23485    23942     +457     
  Branches       3305     3349      +44     
============================================
+ Hits          16775    16996     +221     
- Misses         5067     5295     +228     
- Partials       1643     1651       +8     

Impacted Files	Coverage Δ	Complexity Δ
...idu/hugegraph/api/filter/AuthenticationFilter.java	28.98% <0.00%> (-3.28%)	0.00 <0.00> (ø)
...n/java/com/baidu/hugegraph/api/graph/BatchAPI.java	27.41% <0.00%> (+0.43%)	0.00 <0.00> (ø)
...n/java/com/baidu/hugegraph/api/job/GremlinAPI.java	17.39% <0.00%> (ø)	0.00 <0.00> (ø)
...ava/com/baidu/hugegraph/api/profile/GraphsAPI.java	13.51% <0.00%> (-0.38%)	0.00 <0.00> (ø)
...a/com/baidu/hugegraph/api/traversers/EdgesAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...om/baidu/hugegraph/api/traversers/VerticesAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...om/baidu/hugegraph/api/variables/VariablesAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../com/baidu/hugegraph/auth/ConfigAuthenticator.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...com/baidu/hugegraph/auth/HugeFactoryAuthProxy.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...om/baidu/hugegraph/auth/StandardAuthenticator.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
... and 99 more

---

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 17417df...2c8eb8c. Read the comment docs.