Merge branch 'gitlab_login' into v3.0.0

NodeApp/.env.vault

NodeApp/package-lock.json

NodeApp/package.json

NodeApp/src/app.ts

...ment/subcommands/AssignmentPublishUnpublishCommandBase.ts

NodeApp/src/commander/session/SessionCommand.ts

...pp/src/commander/session/subcommands/SessionAppCommand.ts

...src/commander/session/subcommands/SessionGitlabCommand.ts

.../src/commander/session/subcommands/SessionLoginCommand.ts

...src/commander/session/subcommands/SessionLogoutCommand.ts

...session/subcommands/application/SessionAppLoginCommand.ts

...r/session/subcommands/gitlab/SessionGitlabLoginCommand.ts

.../session/subcommands/gitlab/SessionGitlabLogoutCommand.ts

NodeApp/src/config/Config.ts

NodeApp/src/config/LocalConfig.ts

NodeApp/src/config/LocalConfigFile.ts

NodeApp/src/managers/DojoBackendManager.ts

NodeApp/src/managers/GitlabManager.ts

NodeApp/src/managers/HttpManager.ts

NodeApp/src/managers/SessionManager.ts