[PLUGIN-1682] Fixed null output schema

[psainics]

Jira Link

• Jira Link

Issue

When user is using macro as any connection properties and set schema manually, it is getting validated properly and pipeline is getting formed using wrangler as transform with proper input schema.
But during pipeline run, outputschema in pipelineconfigurer for snowflake is set to null in case of macros and that is causing null pointer exception mentioned in the jira ticket.

BugFix

When macros are enabled and schema cannot be fetched, we are fetching config.schema and setting it as outputschema.

Unit Test

• 2 Unit Test are added to verify the logic
• When user has set the schema and when the user has not

1. testGetSchemaWhenMacroIsEnabled
2. testGetSchemaWhenMacroIsEnabledSchemaIsNull

[MrRahulSharma]

Please update the description:

1. JIRA link
2. RCA for the issue, and explanation for the fix.

[vikasrathee-cs]

Please update the description:

1. JIRA link
2. RCA for the issue, and explanation for the fix.

Updated.