Remove references to OpenShift cluster

[johnmcollier]

Signed-off-by: John Collier John.J.Collier@ibm.com

What type of PR is this?

Uncomment only one /kind line, and delete the rest.
For example, > /kind bug would simply become: /kind bug

/kind cleanup

What does does this PR do / why we need it:
This PR changes references to OpenShift cluster to cluster in places where the code could be referring to either an OpenShift cluster or Kubernetes cluster.

Which issue(s) this PR fixes:

Fixes #2852

How to test changes / Special notes to the reviewer:

1. Build my branch
2. Create / Delete a URL, verify that it says cluster instead of OpenShift cluster

[maysunfaisal]

changes look good
/lgtm

[johnmcollier]

/retest

[codecov]

Codecov Report

Merging #2861 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2861      +/-   ##
==========================================
- Coverage   43.70%   43.68%   -0.03%     
==========================================
  Files          97       97              
  Lines        8783     8801      +18     
==========================================
+ Hits         3839     3845       +6     
- Misses       4580     4593      +13     
+ Partials      364      363       -1     

Impacted Files	Coverage Δ
pkg/util/util.go	65.40% <0.00%> (-1.70%)	⬇️
pkg/application/application.go	40.00% <0.00%> (-1.27%)	⬇️
pkg/odo/util/cmdutils.go	1.69% <0.00%> (ø)
pkg/occlient/occlient.go	52.73% <0.00%> (+0.03%)	⬆️
pkg/component/component.go	24.38% <0.00%> (+0.59%)	⬆️

---

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[kadel]

/approve

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kadel

The full list of commands accepted by this bot can be found here.

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• OWNERS [kadel]

Approvers can indicate their approval by writing /approve in a comment
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[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.

[openshift-bot]

/retest

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