Fix hotreload with mono module project

     info Looking for Nuxeo bundles in /Users/fvadon/Dev/labswebui/pom.xml file.
events.js:161
      throw er; // Unhandled 'error' event
      ^

TypeError: Path must be a string. Received true
    at assertPath (path.js:7:11)
    at Object.join (path.js:1211:7)
    at constructor._computeClassesFolder (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/generator-nuxeo/generators/hotreload/hotreload.js:18:17)
    at constructor._isModuleBuilt (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/generator-nuxeo/generators/hotreload/hotreload.js:49:29)
    at _.each (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/generator-nuxeo/generators/hotreload/hotreload-delegate.js:44:17)
    at arrayEach (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/lodash/lodash.js:537:11)
    at Function.forEach (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/lodash/lodash.js:9359:14)
    at LodashWrapper.object.(anonymous function) [as each] (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/lodash/lodash.js:15693:25)
    at constructor.writing (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/generator-nuxeo/generators/hotreload/hotreload-delegate.js:38:16)
    at delegate (/Users/fvadon/.nvm/versions/node/v7.5.0/lib/node_modules/nuxeo-cli/node_modules/generator-nuxeo/generators/hotreload/index.js:67:31)