show formatted json for machine readable output

[girishramnani]

What is the purpose of this change? What does it change?

Use formatted json output for Machine Readable Output, This aligns us with oc and kubectl and also makes it easy for developers to consume the output.
Used the same spacing and prefix used by oc

Was the change discussed in an issue?

fixes ##2235

How to test changes?

odo list -o json
# or any other json output to confirm that the output is formatted

[cdrage]

/retest

[cdrage]

Implementation and code looks great from me.

Tests look like they're failing, but that seems to be a flake (since 4.1 passes fine...)

/approve
/hold

Remove the hold when you're ready for merge!

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cdrage

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[dharmit]

/lgtm

[dharmit]

level=fatal msg="failed to fetch Cluster: failed to generate asset \"Cluster\": failed to create cluster: failed to apply using Terraform"
2019/10/10 15:10:57 Container setup in pod integration failed, exit code 1, reason Error

/test v4.1-integration

[dharmit]

level=error msg="Error: Error creating VPC: VpcLimitExceeded: The maximum number of VPCs has been reached."

/test v4.2-benchmark

[dharmit]

@girishramnani something wrong with the tests?

�[91m�[1mSummarizing 2 Failures:�[0m

�[91m�[1m[Fail] �[0m�[90modo component command tests �[0m�[0mCreating component �[0m�[91m�[1m[It] should list out component in json format along with path flag �[0m
�[37m/go/src/github.com/openshift/odo/tests/integration/component.go:115�[0m

�[91m�[1m[Fail] �[0m�[90modo component command tests �[0m�[0mCreating component �[0m�[91m�[1m[It] should list out pushed components of different projects in json format along with path flag �[0m
�[37m/go/src/github.com/openshift/odo/tests/integration/component.go:146�[0m

[girishramnani]

Seems like, I am trying to figure out what. I even flattened the json output

[girishramnani]

/hold cancel

[dharmit]

/lgtm