Reconstruction for Hint Manager.

[tristaZero]

Fixes #1289.

Changes proposed in this pull request:

• Reconstruct Hint manager.
• Reconstruct Hint manager holder.
• Modify some cases.

[coveralls]

Pull Request Test Coverage Report for Build 5246

• 31 of 32 (96.88%) changed or added relevant lines in 2 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 62.859%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
sharding-core/src/main/java/io/shardingsphere/core/hint/HintManagerHolder.java	27	28	96.43%

Files with Coverage Reduction	New Missed Lines	%
sharding-core/src/main/java/io/shardingsphere/core/hint/HintManagerHolder.java	1	94.29%
sharding-orchestration/sharding-orchestration-reg/src/main/java/io/shardingsphere/orchestration/reg/newzk/client/zookeeper/base/Holder.java	3	70.49%

Totals
Change from base Build 5243:	-0.02%
Covered Lines:	8061
Relevant Lines:	12824

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💛 - Coveralls