Fix formatting issues

[lasanthaDLPDS]

Purpose

The purpose of this PR is to fix formatting issues of the device-mgt.

Goals

In order to compatible with WSO2 coding standards, format the source.

Approach

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User stories

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Release note

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Documentation

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Training

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Certification

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Marketing

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Automation tests

• Unit tests

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• Integration tests

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Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines? yes
• Ran FindSecurityBugs plugin and verified report? yes
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets? yes

Samples

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Related PRs

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Migrations (if applicable)

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Test environment

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Learning

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