Follow same initialization pattern as other clients

[dharmit]

What type of PR is this?
/kind cleanup
/kind code-refactoring

What does this PR do / why we need it:
All the other clients are initiated in similar manner except
client.appsClient. This commit just makes things uniform.

Which issue(s) this PR fixes:

Fixes NA.
Part of #4298

PR acceptance criteria:

• Unit test

• Integration test

• Documentation

• I have read the test guidelines

How to test changes / Special notes to the reviewer:
Tests should pass

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dharmit

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• OWNERS [dharmit]

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[mik-dass]

/lgtm

[mik-dass]

https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_odo/4323/pull-ci-openshift-odo-master-v4.6-integration-e2e/1340983473195716608#1:build-log.txt%3A415

[odo] I1221 12:25:51.785682   12374 events.go:36] Quitting collect events
[odo]  ✗  Waiting for component to start [4m]
[odo]  ✗  waited 4m0s but couldn't find running pod matching selector: '

[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.