ask OS for available port if default one is busy.

Silabs

- Changing the generation-options.json template file to use joinRecords instead of tableName in group-info-into-db-row-type and thus removing table names
- Changing the handlebar template files to reflect the above. Also the same applied to static-generator.js
- JIRA: ZAPP-143, JIRA: ZAPP-137

Removing the use of column names in handlebar templates and instead using the mapping provided in db-mapping.js because this will future proof any changes needed for column names in handlebar templates.

- Adding more mappings to db-mapping.js as needed by generation
- Changing sql queries used for generation to use db-mapping.js
- Using selectAllClustersApartFromNull instead of selectAllClusters to avoid getting global clusters
- Changing APIs in helper-utils.js to use the db-mapping scheme when referring to column names
- Changing all handlebar templates to use the db-mapping scheme column names
- Making changes to generation-options.json which holds the template data for generation to use the naming in db-mapping.js
- JIRA: ZAPP-143 JIRA-ZAPP-137

Making changes such that generation-options.json file is present in the handlebar template directory

JIRA: ZAPP-139

JIRA: ZAPP-139

Removing constants/hardcoded values from generation files menu.js and generation.js and moving them to a template file such as test/gen-template/generation-options

- Added a new cluster query which gets all clusters apart from global clusters in query-zcl.js
- Cleaned up static-generator.js, menu.js and generation.js such that files can be generated generically using generation-options.json. Going through each generation option in generation-option.js and applying a common generation functionality instead of generating each file in a different mechanism.
- Making changes to ZclLayout.Vue such that when a get request is made the request parameters are the same as the generated file names without extension
- Modifying testing as per the above changes
- Adding the addition generation-options.json file in the test/gen-template folder
- JIRA: ZAPP-139

Daily work

This reverts commit ef29e1df.

Daily work merge

Fix queries to for the user configuration. Change default added endpoint type to zll-onofflight due to it being more comprehensive

- Added testing for command line generation by generating in a folder and deleting the folder once generation is complete
- Made generateCodeViaCli, setHandlebarTemplateDirForCli and generateCode in menu.js to return promises
- Making sure app exits once the generation is complete

- JIRA: ZAPP-138

We should add this to a pre-commit check or something.