feat: support json/yaml param using new flag --param-yaml

[odinnordico]

Pull request

What this PR does / why we need it

Adds support for JSON and YAML notation values of parameters through the new flag --param-yaml which has the same behavior as the existing --param but the value only supports valid JSON/YAML otherwise the command will fail

Which issue(s) this PR fixes

Fixes #103

Describe testing done for PR

Local sandbox for CLI against TAP 1.1 cluster:

Create a workload:

tanzu apps wld create tanzu-java-web-app --image gcr.io/dalfonso-tanzu-dev-frmwrk/tanzu-java-web-app-2-6-default:latest \                                                                [22/05/19| 4:03PM]
--param ports_string='{"name": "smtp", "port": 1026}' \
--param-yaml ports_json='{"name": "smtp", "port": 1026}' \
--param-yaml ports_yaml=$'name: smtp\nport: 1026' \
--param-yaml ports_array_json='[{"name": "smtp", "port": 1026},{"name": "tcp", "port": 8080}]' \
--param-yaml ports_array_yaml=$'- name: smtp\n  port: 1026\n- name: tcp\n  port: 8080' \
--param-yaml ports_nesting_json='[{"deployment": {"name": "smtp", "port": 1026}}]' \
--param-yaml ports_nesting_yaml=$'- deployment:\n    name: smtp\n    port: 1026'

Invalid json/yaml and help message

Creating Workload

Removing param

Updating param

Exporting the wld

Additional information or special notes for your reviewer

[atmandhol]

I think we should fail if the input is not a valid json or yaml for the --param-yaml flag input instead of accepting that as a string. @rashedkvm @heyjcollins thoughts?

[odinnordico]

I think we should fail if the input is not a valid json or yaml for the --param-yaml flag input instead of accepting that as a string. @rashedkvm @heyjcollins thoughts?

You are right, updated to fail on invalid json/yaml

[shashwathi]

Add unit tests at apply/create/update sub-commands with param-yaml flags

[odinnordico]

Add unit tests at apply/create/update sub-commands with param-yaml flags

Added some test

[shashwathi]

looks good.

[rashedkvm]

Question: Is nested yaml for params supported from workload file instead of flag? For workload apply and workload create can you add a test where the yaml file contains the nested yaml.