KYLIN-4499 Refine waiting time for initialization

[kyotoYaho]

Proposed changes

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Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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• I have create an issue on Kylin's jira, and have described the bug/feature there in detail
• Commit messages in my PR start with the related jira ID, like "KYLIN-0000 Make Kylin project open-source"
• Compiling and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• If this change need a document change, I will prepare another pr against the document branch
• Any dependent changes have been merged

Further comments

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[coveralls]

Pull Request Test Coverage Report for Build 6031

• 6 of 7 (85.71%) changed or added relevant lines in 1 file are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.01%) to 27.98%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core-common/src/main/java/org/apache/kylin/common/zookeeper/KylinServerDiscovery.java	6	7	85.71%

Files with Coverage Reduction	New Missed Lines	%
core-cube/src/main/java/org/apache/kylin/cube/inmemcubing/MemDiskStore.java	5	77.81%

Totals
Change from base Build 6029:	0.01%
Covered Lines:	26113
Relevant Lines:	93326

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💛 - Coveralls

[lgtm-com]

This pull request introduces 1 alert when merging 5ade33a into d05a23f - view on LGTM.com

new alerts:

• 1 for Result of multiplication cast to wider type

[hit-lacus]

Close this because it is merged in #1271