Change the cluster creation logic

[alirezazamani]

Issues

• My PR addresses the following Helix issues and references them in the PR description:
  Fixes TODO: Populate topology information while creating cluster #871

Description

• Here are some details about my PR, including screenshots of any UI changes:
  In this PR, a minor modification has been added which:
  1- Populated the Topology information in the Cluster Config
  if cloud is enabled.
  2- Tests have been change accordingly.
  3- The deprecated APIs have been changed in the test to
  follow new APIs.

Tests

• The following is the result of the "mvn test" command on the appropriate module:

Helix-core:
[INFO] Tests run: 906, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3,585.59 s - in TestSuite
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 906, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 59:51 min
[INFO] Finished at: 2020-03-05T20:13:30-08:00
[INFO] ------------------------------------------------------------------------

Helix-Rest:
[INFO] Tests run: 99, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 27.966 s - in TestSuite
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 99, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 33.294 s
[INFO] Finished at: 2020-03-05T19:12:48-08:00
[INFO] ------------------------------------------------------------------------

Commits

• My commits all reference appropriate Apache Helix GitHub issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Code Quality

• My diff has been formatted using helix-style.xml

[junkaixue]

LGTM

[alirezazamani]

This PR is ready to be merged, approved by @dasahcc and @jiajunwang

FInal Commit message:

Title:
Add cluster config update for cluster creation logic in Azure

Body:
In this commit, minor modifications have been added which:
1- Update topology information in the Cluster Config
if cloud is enabled for Azure environment.
2- Tests have been change accordingly.
3- The deprecated APIs have been changed in the test to
follow new APIs.