Bump httpclient from 4.5.2 to 4.5.13

[javeme]

also fix added leading "/" into url by URIBuilder:
https://github.com/hugegraph/hugegraph/pull/1487#issuecomment-998749310

Change-Id: I71aa4f75bf53fd3841f51856af3df85169b37d66

[codecov]

Codecov Report

Merging #1706 (b5ec777) into master (68e3467) will increase coverage by 0.00%.
The diff coverage is 70.00%.

@@            Coverage Diff            @@
##             master    #1706   +/-   ##
=========================================
  Coverage     66.82%   66.83%           
  Complexity     7068     7068           
=========================================
  Files           420      420           
  Lines         34726    34731    +5     
  Branches       4822     4822           
=========================================
+ Hits          23206    23212    +6     
+ Misses         9178     9176    -2     
- Partials       2342     2343    +1     

Impacted Files	Coverage Δ
...u/hugegraph/backend/store/mysql/MysqlSessions.java	57.93% <66.66%> (+0.04%)	⬆️
...h/backend/store/postgresql/PostgresqlSessions.java	77.50% <100.00%> (ø)
...a/com/baidu/hugegraph/backend/query/Condition.java	79.42% <0.00%> (-0.37%)	⬇️
...c/main/java/com/baidu/hugegraph/task/HugeTask.java	72.30% <0.00%> (+0.30%)	⬆️
...va/com/baidu/hugegraph/task/ServerInfoManager.java	74.15% <0.00%> (+0.56%)	⬆️
...ain/java/com/baidu/hugegraph/task/TaskManager.java	70.50% <0.00%> (+1.43%)	⬆️

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