Enable yeoman debug on CI.

[mshima]

Overview of the feature request

We should enable yeoman debug on CI, this will improve jhipster workflow debugging.

Motivation for or Use Case

Currently:

This is an existing project, using the configuration from your .yo-rc.json file 
to re-generate the project...


Installing languages: en, fr

With DEBUG:

This is an existing project, using the configuration from your .yo-rc.json file 
to re-generate the project...

2019-10-15T15:10:57.917Z yeoman:generator Running askForModuleName
2019-10-15T15:10:57.917Z yeoman:generator Running askForServerSideOpts
2019-10-15T15:10:57.919Z yeoman:generator Running askForOptionalItems
.
.
.
2019-10-15T15:10:57.951Z yeoman:generator Running validateFromCli
2019-10-15T15:10:57.951Z yeoman:generator Running setupConsts

Installing languages: en, fr

With DEBUG and yeoman/generator#1128:

This is an existing project, using the configuration from your .yo-rc.json file 
to re-generate the project...

2019-10-15T15:21:58.958Z yeoman:generator Running home:vsts:work:1:s:server#askForModuleName
2019-10-15T15:21:58.958Z yeoman:generator Running home:vsts:work:1:s:server#askForServerSideOpts
.
.
2019-10-15T15:21:58.990Z yeoman:generator Running home:vsts:work:1:s:languages#validateFromCli
2019-10-15T15:21:58.990Z yeoman:generator Running home:vsts:work:1:s:languages#setupConsts

Installing languages: en, fr

Related issues or PR

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