KYLIN-4855 kylin.metrics.prefix bug fix

[wolfboys]

Proposed changes

After executed "system-cube.sh cron", the system cube will be added to the crontab, but the cube name is wrong, and it does not match the actual situation. After testing, it is found that the system-cube is
There is a bug in the handling of kylin metrics prefix

In system-cube.sh, the prefix is "KYLIN". The logic is wrong. You should get "kylin.metrics.prefix" from kylin.properties. If this item is set, take the value set by the user, if not set, go to the default value. "KYLIN"

In bin/build-incremental-cube.sh The username and password default value ADMIN:KYLIN, if the password has been changed, it will not work

Types of changes

What types of changes does your code introduce to Kylin?
Put an x in the boxes that apply

• 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

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• 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

If this is a relatively large or complex change, kick off the discussion at user@kylin or dev@kylin by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov-io]

Codecov Report

Merging #1536 (be98fd8) into master (47f8e54) will decrease coverage by 0.09%.
The diff coverage is 1.23%.

@@             Coverage Diff              @@
##             master    #1536      +/-   ##
============================================
- Coverage     25.51%   25.41%   -0.10%     
+ Complexity     6765     6763       -2     
============================================
  Files          1505     1508       +3     
  Lines         93632    93918     +286     
  Branches      13117    13158      +41     
============================================
- Hits          23886    23872      -14     
- Misses        67370    67664     +294     
- Partials       2376     2382       +6     

Impacted Files	Coverage Δ	Complexity Δ
.../java/org/apache/kylin/common/KylinConfigBase.java	12.46% <0.00%> (-0.05%)	51.00 <0.00> (ø)
...n/java/org/apache/kylin/common/util/ClassUtil.java	49.20% <0.00%> (-2.47%)	9.00 <0.00> (ø)
.../java/org/apache/kylin/job/util/JobRestClient.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...che/kylin/engine/spark/SparkMergingDictionary.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...g/apache/kylin/query/relnode/OLAPAggregateRel.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../org/apache/kylin/query/relnode/OLAPFilterRel.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../org/apache/kylin/query/relnode/OLAPWindowRel.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../query/relnode/visitor/TupleExpressionVisitor.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...torage/hbase/steps/HBaseFlinkOutputTransition.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...che/kylin/storage/hbase/steps/HBaseFlinkSteps.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
... and 19 more

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[hit-lacus]

Good job @wolfboys , I will check it later!

[zhangayqian]

LGTM and test passed.

[hit-lacus]

LGTM

[hit-lacus]

Thanks @wolfboys for contributions, thanks @zhangayqian for verification.