Add api white list and rate limiter for gc

[Linary]

Change-Id: Ia7ac5dc5d7d91676701738f2a0ae5073f9ceb01e

[codecov]

Codecov Report

Merging #522 into master will increase coverage by 0.09%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #522      +/-   ##
============================================
+ Coverage     69.98%   70.07%   +0.09%     
- Complexity     3400     3409       +9     
============================================
  Files           216      216              
  Lines         16500    16503       +3     
  Branches       2359     2360       +1     
============================================
+ Hits          11547    11564      +17     
+ Misses         3692     3681      -11     
+ Partials       1261     1258       -3

Impacted Files	Coverage Δ	Complexity Δ
...java/com/baidu/hugegraph/type/define/DataType.java	92.53% <100%> (+28.47%)	34 <9> (+11)	⬆️
...n/java/com/baidu/hugegraph/task/TaskScheduler.java	51.45% <0%> (-1.25%)	26% <0%> (-1%)
...va/com/baidu/hugegraph/backend/cache/RamCache.java	72.15% <0%> (-0.4%)	44% <0%> (-1%)
...a/com/baidu/hugegraph/backend/query/Condition.java	64.55% <0%> (ø)	23% <0%> (ø)	⬇️

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