[Bugfix] init RepoSetting values

[astroshim]

What is this PR for?

This PR fixes initialize value bug of Add New Repository.

What type of PR is it?

Bug Fix

How should this be tested?

1. launch the Add New Repository modal window.
2. put URL value
3. hit Cancel button
4. launch the Add New Repository modal window again.

Screenshots (if appropriate)

• before
  
• after
  

Questions:

• Does the licenses files need update? no
• Is there breaking changes for older versions? no
• Does this needs documentation? no

[astroshim]

It seems that the CI error is not related this PR.

Tests in error: 
  ZeppelinIT.testSparkInterpreterDependencyLoading:217->AbstractZeppelinIT.createNewNote:119 » Timeout

I updated CI issue on https://issues.apache.org/jira/browse/ZEPPELIN-878

[jongyoul]

Could you please re-trigger it?

[astroshim]

I re-triggered but other error occurred.
It seems that the CI fail is related to #1084.

Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.579 sec <<< FAILURE! - in org.apache.zeppelin.python.PythonInterpreterTest
testClose(org.apache.zeppelin.python.PythonInterpreterTest)  Time elapsed: 0.429 sec  <<< FAILURE!
java.lang.AssertionError: null
    at org.junit.Assert.fail(Assert.java:86)
    at org.junit.Assert.assertTrue(Assert.java:41)
    at org.junit.Assert.assertFalse(Assert.java:64)
    at org.junit.Assert.assertFalse(Assert.java:74)
    at org.apache.zeppelin.python.PythonInterpreterTest.testClose(PythonInterpreterTest.java:141)


Results :

Failed tests: 
  PythonInterpreterTest.testClose:141 null

[jongyoul]

It's flaky test but we need to ensure all the test passed. Could you please do it once again?

[astroshim]

CI has passed. Thanks.

[jongyoul]

I'll merge it